Nice score, I can imagine what was going through your head when you went to the register. Either the guy had no clue or possibly he would say oops that is a mistake they are actually not for sale.
I have been looking for one of those the past month and just can't pull the trigger on eBay or amazon. If you plan to sell one let me know
Might have to check out captain America at my lcs
I was happy finding 4 infinity gauntlet #1 in good shape in the .25 bin! no where near your steal