This will likely always be a very small, very obscure list. Any help in tracking down these cards would be greatly appreciated.
1991 Carvel Yankees Juniors Team Photo
1992 Cord Camera Columbus Clippers Photo
2006 Columbus Clippers 30th Anniversary Program insert
This is based on a tip from Dave Weber, the minor league card guru. I have never seen these cards so have no idea what they look like, but presumably they were included in Clippers programs during the 2006 season. These should not be confused with the 2007 set that covered players from the history of baseball in Columbus.
2010 Upper Deck 1990 20th Anniversary Buy Back
A few sets of these cards were apparently back-doored from Upper Deck, and have made their way into the secondary market. So far, I only know of a single person who has them, but he hasn't sold any in awhile. These are just 1990 Upper Deck cards with the same 20th Anniversary stamp that was used on the 1989 buy back cards in 2009.
2012 San Francisco Giants Team Issue photo card
These are the cards that are only given away at Giatns Fan Fest events at AT&T Park. They are blank backed, feature black & white photography and are slightly taller than a standard baseball card. They are most commonly found signed. I would prefer a non-signed copy, but will take what I can get. At the moment, I'm offering $20 shipped for this card (signed or unsigned).
2013 BBM Legendary Foreigners 2 Deep Impact Autographed /48
2013 Leaf Pride of the Pinstripe /4
2017 Topps 1993 Buyback Bronze