It's an auction so I have no idea what it would go for. People who bids up to $85 for a $100 PS3 game.....they are total idiots and should be banned from auctions. They are the ones that has no idea about market price and are just there for the excitement of an auction. I'll say $50 is definitely achievable.
In the PS3 games I've seen Battlefield, Bioshock 2, FF13.....

I'm still spewing about missing out on a 24 ports Linksys Gigabit switch. It's worth over $2000 brand new......but in the auction it was left in a server rack......the whole rack went for $20.