Mike Baker Authenticated (MBA): What Vintage Collectors Should Know Before Paying for a Sticker

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If you’ve been spending time at card shows or following the hobby online lately, you’ve probably come across the MBA Diamond sticker — a silver, gold, or black diamond certification that Mike Baker’s company places on already-graded PSA, SGC, and BGS slabs to signal that a card is a premium example for its grade.

I recently watched a podcast interview with Leighton from Just Collect with Mike Baker. Baker made some genuinely interesting points about PSA’s treatment of vintage cards.

His core argument — that the major grading companies have deprioritized vintage material, treating pre-war cards as “guilty until proven innocent” — resonated with me. I’ve personally seen too many vintage cards come back from grading with numbers I disagree with.

But before you spend money on a sticker that grades a grader, there are some serious questions worth asking. As someone who has been collecting cards since the 80’s and authenticating pre-war tobacco cards for over 20 years, I have some thoughts on the topic. Here’s my take.

First Of All – Who Is Mike Baker?

I had never heard Baker’s name before and I honestly just found out about MBA – and was surprised to learn they have been in business for nearly six years now. Baker was among PSA’s first employees, eventually serving as Director of Grading, and spent years at the forefront of building the third-party grading industry we know today. He later led the trading card division at Global Authentication Inc. (GAI) and in 2009 actually purchased GAI’s card and pack authentication and grading assets after they filed for bankruptcy.

The issue with Baker is that GAI had a bit of a shady past. Initially GAI was a pretty good grader, with a good reputation and even was well regarded for its pack grading. However, in its later years, GAI was grading a lot of altered cards, and this happened under the purview of Baker.

Another knock I recently discovered – Baker via his company MBA is associated with Brent Huigens from PWCC, who is a manager at the company. For those not familiar, Huigens and his firm PWCC was accused of selling altered cards on its platform and was ultimately banned from selling on eBay.

Interestingly enough it is PWCC which was one of the first companies to come up with an ‘eye appeal’ sticker, so my guess is that Huigens had some sort of impact in the past and future development of MBA’s business.

What Does MBA Actually Do?

MBA doesn’t replace PSA or SGC. It adds a certification sticker to an already-graded slab:

• Silver Diamond — High-end example for its grade, MBA calls this a card with ‘Superior Eye Appeal’
• Gold Diamond — These are cards that MBA things are worthy of an upgrade to their assigned grade. MBA says these are a part of 5% of the population and effectively deserve a half-point upgrade (so an 8 that looks like an 8.5 would fall in this category)
• Black Diamond — These are reserved for PSA 10s that represent the absolute top of that designation

Cards are evaluated on centering, corners, edges, surface, and overall eye appeal — front and back. MBA also maintains a population report so you can see how many cards of a given type have received each sticker tier.

Baker recently launched a $10 digital review service — you upload a photo and within 48 hours receive a candidacy determination with notes explaining why a card did or didn’t qualify. That’s a low-cost way to vet a card before committing to a full submission. In addition, they now offer their own grading service.

The Case For MBA

Supporters make some fair points:

Not all 8s are created equal.

This is genuinely true and any serious collector knows it. A PSA 8 with 55/45 centering and strong corners is a fundamentally different card from a PSA 8 that barely made the grade. Online, those differences are hard to convey through scans alone.

Case in point – here are two Gretzky Topps PSA 8 rookie cards. The first one has a MBA Silver Diamond sticker, which just says that this card has strong eye appeal. And then another without an MBA sticker which is off-centered, which is very common for PSA graded cards. Notably, this type of centering fits in with PSA’s standards, but it should be clear which card appears better for the grade.

The market data is real.

Proponents point to sales data showing MBA-stickered cards commanding premiums above equivalent unstickered examples. Whether the sticker causes that premium or simply reflects that only the best cards get submitted is debatable — but the price differential exists.

I admittedly was a bit shocked when I looked into some recent sales prices for PSA graded cards with an MBA Gold Diamond sticker. Case in point this 1982 Topps Traded Cal Ripken, graded a PSA 9 with an MBA Gold Sticker. It sold for $3700 at auction. The average selling price for a PSA 9 Ripken Topps Traded RC is only about $600. So, it appears that some collectors are willing to accept that this Gold sticker is worthy of pushing a PSA 9 closer to a PSA 10 value, which is currently about $8,000.

Baker’s grading eye is legitimate.

Even his harshest critics on Net54 acknowledge that at his peak, Baker was among the best graders in the hobby. His ability to assess quality within a grade is not seriously disputed.

My Concerns — And They’re Significant

1. You Cannot Authenticate What You Cannot See

This is my biggest issue, and I raised it independently before reading anything others had written about MBA.

Trimming is the most serious form of card alteration in the vintage market. A trimmed card has had its edges physically cut to improve apparent centering or remove paper loss. It’s fraud.

MBA evaluates cards while they remain sealed in their slabs. Baker never removes the card.

That means Baker cannot see the edges with absolute accuracy. And the edges are exactly where trimming evidence lives — in the thickness, the fiber pattern, the cut profile. No matter how experienced the grader, you cannot detect trimming through plastic. So, i’m not criticizing Baker’s expertise but this is indeed a structural limitation of the service.

Members of the Net54 vintage community — the most knowledgeable pre-war collectors in the hobby — have reported seeing at least one card receive an MBA Gold sticker that appeared to be diamond-cut.

For modern cards where trimming isn’t a meaningful concern, this limitation matters less. For pre-war tobacco cards — T206, T205, E-series, where trimming is rampant and values are high — I consider this a concerning trend.

2. The GAI History Is Hard to Ignore

Baker’s tenure at GAI and its successor Global Authority is a legitimate part of this conversation, and I’d be doing you a disservice by leaving it out.

The vintage collecting community has long held that high-grade cards in GAI holders carry a stigma — that the company, during a certain period, graded altered cards that should not have received numbers. Multiple experienced collectors have alleged Baker was directly responsible for some of those grades.

Beyond grading accuracy, Global Authority’s collapse left some collectors without their submitted cards or their money. These are serious allegations. Baker has not, to my knowledge, publicly addressed them in detail.

I’m not in a position to independently verify every specific claim made on collector forums. But when the most knowledgeable vintage community in the hobby raises these concerns repeatedly and specifically, they deserve acknowledgment.

One recent Net54 post pointed to several MBA graded cards that appear to clearly looked trimmed. One is this T205 Gold Border Mathewson card, awarded an MBA 7 grade. I would agree it looks like it was sharpened up on the borders and corners.

In addition, it appears that Baker is grading known altered card, and assigning an actual grade to them. I’m not sure how this makes any sense and it makes me start doubting the legitimacy of Baker’s grading service. Case in point is this Cracker Jack Ty Cobb – noted on the slab with a ‘Minimum Size’ warning, but handed a 5.5 Ex+ grade. This card has obviously been altered.

Here’s another one that MBA graded that went to Mile High Auctions (which appears to be listing a lot of MBA graded cards) and is without a doubt trimmed. I was alerted to this one by blowout forums.

3. The Conflict of Interest Problem

Any certification service that only makes money when it approves cards has a structural incentive to approve cards. A business that turns away too many submissions doesn’t survive long.

This doesn’t mean Baker is acting in bad faith. But it’s worth understanding that the financial pressure runs in one direction — toward generosity, not rigor.

However, to their credit, I’ve seen some collectors say that MBA has been somewhat stringent in awarding diamonds.

4. No Accountability If Something Goes Wrong

If you buy a card with an MBA sticker and it later turns out to be trimmed or altered, there is no guarantee, no recourse, and no financial consequence for the certifier. You bear all the risk.

Compare that to buying a card with a PSA or SGC grade — those companies have guarantee programs, however imperfect. MBA offers an opinion, not a warranty.

Does the MBA Sticker Actually Pay Off?

This is the question that matters most if you’re considering submitting a card. I already showed you the Ripken Gold Diamond that sold for a significant premium. Here are a few other recent sales of interest.

This 1989 Upper Deck Ken Griffey Jr Rookie Card PSA 10 with an MBA Gold Diamond Sticker sold for $10,000 at auction recently. A standard PSA 10 Griffey sells normally for $6,000, so that little sticker added $4,000 of value. Unreal.

The cost to add the sticker? Here’s the calculations.

Base PSA 10 market value: $6,000

• Base fee: $35 (covers first $1,000)
• FVF: 3% × $5,000 (excess over $1,000) = $150
• Total MBA cost: $185 + $15 submission fee or $200 Total

Card sold for: $10,000 Net gain after MBA fee: $3,800

That’s a compelling case for modern cards. You paid $200, added $4,000 in value, and netted $3,800 in upside. Hard to argue with that math.

Thus, based on the cards, I’ve reviewed, the math on submission costs is at least favorable. MBA charges as little as $15 per card depending on the service tier, so on a card worth several hundred dollars or more, even a modest premium clears the cost of submission easily.

But here’s the problem with interpreting that premium as proof the sticker adds value: the cards that get submitted to MBA are already the best examples a collector owns. A dead-centered PSA 8 with strong corners was going to sell for more than a so-so PSA 8 regardless of whether it had a sticker. When stickered cards sell for more, you can’t cleanly separate “the MBA certification added value” from “this was already a superior card that the market was going to reward anyway.”

The Net54 community raised exactly this point — the premium may be entirely self-selecting, not sticker-driven.

For modern cards — high-grade Jordan rookies, Griffey Upper Decks, key 1980s and 1990s cards where trimming isn’t a concern — the math can work if you have a genuinely premium example. Submission is cheap, the premium is real enough, and the authentication risk is low.

For vintage pre-war material, there is almost no reliable data on MBA premiums specifically, and the authentication risk I outlined above still outweighs any potential upside. A modest price bump on a T206 is not worth the risk of buying a card with an MBA sticker that turns out to be trimmed — because the sticker, structurally, cannot tell you whether it is or isn’t.

Case in point here’s a 1952 Topps Mantle with an MBA Gold Diamond sticker. Personally, I think this Mantle looks accurately graded. Could it be a PSA 2.5? Maybe? But I wouldn’t make that assessment without taking the card out of the holder. The card sold for $103,000 at auction in May 2026. The average sales price of a PSA 2 Mantle (with no MBA sticker)? About $100K. And there was one that sold for $120K+ a few months earlier that had poorer eye appeal.

Let me run the fee math on this one:

The $103,000 Mantle MBA Gold scenario:

• Base fee: $35 plus $15 submission fee
• FVF: 3% × $100,000 (excess over $1,000) = $2,970
• Total MBA cost: $3,020

And the result? The card sold for roughly what a standard PSA 2 Mantle sells for anyway — $100K baseline, with at least one comparable selling for $120K+ without a sticker and with poorer eye appeal.

So in this case the seller paid $3,020 for zero measurable premium. Possibly worse — the $120K no-sticker sale suggests the market isn’t even consistently rewarding the sticker on high-value vintage.

The Bottom Line

MBA Diamond is an interesting service with a legitimate use case for modern cards where eye appeal differentiation matters and trimming isn’t a concern. If you’re trying to identify the best PSA 10 Ken Griffey Jr. 1989 Upper Decks in the market, a credible second opinion on eye appeal has real value.

For vintage pre-war material — which is my world and probably yours if you’re reading this — I’m not comfortable relying on a service that cannot physically inspect card edges. The authentication risk is too high and the credibility questions around Baker’s GAI history are too unresolved for me to recommend it with confidence.

My advice: trust your own eyes, or the eyes of someone who will actually take the card out of the holder. That’s the only way to know what you’re really buying.

If you have questions about authenticating a specific pre-war card, feel free to reach out. I’m always happy to talk vintage.

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