hi, fellow gamers, recently these came from former employee from sony, these memory cards have numbers and so on except for one which said, SLUS-20981 TEENAGE MUNTANT NINJA TURTLES 2 BATTLE NEXUS 2004 08 06 KONAMI, what are these cards worth? or do i just erase the info and sell them as regular memory cards? any info would be great, i have about 125 of these. thanks