[chrisolds]

I'm trying to find out the print run for the Cooperstown Calling autographs out of 2007 Upper Deck Series 2 baseball. I recently picked up a Carl Crawford, but I've never seen another card from set. Any idea how many were made?

If there was an announced print run, it would be noted with the set or card listing on Beckett.com. If not, the company never disclosed it.

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What does MEM stand for in the price guide?

There are abbreviations used for subsets or special cards from time to time in set listings. I would have to see which one you are looking at to know for sure.

However, a likely possibility is that you're looking at a memorabilia card.

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I don't quite know what to make of this, but in 1989 Upper Deck, Gary Pettis #117 was shown on the front holding a copy of his..what else? 1989 Upper Deck card. Now I realize that it isn't the exact back as was printed normally, but in my case, there was no back at all. In other words I have one with a blank back. Was that common? Or is it a rare error card no one ever said anything about?

Blank backs happen from time to time in all products. However, they are considered to be misprinted cards. They are not cataloged because they could happen at any time on any card in any amount.