From a reader:
Hey Mike good question, uncut sheets are a tricky one. It comes down to the rarity of the sheets, the condition of the cards, and the end demand for the cards in question. It's hard for collectors to store and display uncut sheets so sometimes the demand isn't always there. It's also hard to maintain the original condition of the sheet due to the rolling and storage constraints. I would start at the very least with the most valuable cards on the sheet and examine their condition. If the sheet is for sale at a rough price of what those cards go far - plus maybe a small premium, assuming the other cards don't have tremendous value, that should be a good starting point. If there's an egregious premium -- 100% for example over the actual card values, then that's probably an unfair starting point---unless we are talking about a really rare sheet, think 1950's baseball or something like that. Star Basketball uncut sheets while not common aren't necessarily rare.
