(07-01-2016, 08:18 AM)djohn Wrote: What you have is a blank back card, which was a printing flaw that occurs when a sheet or card goes through one print cycle but then doesn't get the other side done. Beckett doesn't list these cards, and the collecting market is pretty niche for these type cards. That being said, a Ken Griffey Jr 2nd year blank back card will definitely have a lot more people interested in it, then the same card of a scrub player. That being said, a quick look on eBay will show that the 1990 Topps Griffey blank bard card is not uber-rare either, and can easily be bought for a couple of dollars. So if you're looking for value there you go, I would place the value to be $2-$5.

(07-01-2016, 09:37 PM)Nintari Wrote: As with cards of this era, the value is usually only on highly graded cards. A PSA 10 '90 Griffey blank back would fetch a lot more than 5 bucks.

I hate that an entire era of cards have been destroyed via over production.

(07-02-2016, 11:11 AM)krn001 Wrote: It could also be a cutout off the top flap of the wax box.

(07-02-2016, 07:52 AM)djohn Wrote: You're correct that ANY PSA 10 would sell for more than the same card ungraded. However I am not sure if PSA will grade blank back cards, as there I did a search for "PSA Topps Blank" on eBay and didn't get a single one (other than cards of players with last names Blank or Blanks).