Since there's more than twelve hours left, they can modify the description.
I don't believe you can modify a description once there are bids.
Anyway, he's shared the questions he got about it, publicly, so I'd say he (sorta) did the right thing.
Q: Is the picture in the photo stock or actually of the items in question? If it's of the items in question you have the Case to the Super System Card 3.0 but the actual card is the 2.0 system card. Aug-10-12
A: Hello, I will state this again to avoid any confusion: It has come to our attention that this card is Version 2.0, while the case states Version 3.0; this auction is pictured and sold "as is." We recommend bidding on this item for collectible purposes instead of operational usage. Thank you for your input!
Q: I hope you don't think that card your showing is a super system 3.0 card because what you have is a 2.0 card showing you may be getting yourself into alot of problems trying to sell this to someone and it won't work with the 3.0 super CD games. I would be willing to give you 30.00 for just the case if interested let me know Thanks DAN Aug-10-12
A: Hello, It has come to our attention that this card is Version 2.0, while the case states Version 3.0; this auction is pictured and sold "as is." We recommend bidding on this item for collectible purposes instead of operational usage. Thank you for your input!