Okay... now don't just flame me to a pulp.  I'm not (God forbid) selling my GameCube.  I'm thinking of buying one for my friend.  I've shafted him for four years straight on his B-Day and I'd like to do something really cool.  Now, my sister bought one a while back for her husband who just doesn't play it anymore and she's thinking of selling it to a Funcoland type store.  I told her she'd probably only be getting store credit, and now she doesn't know what to do. Enter me, I kinda have to lowball her because I'm crazy poor, but I want to be fair. Do you think $100 is too low for a used GC + 4 Controllers + 1 or 2 Games? Should I go higher? Keep in mind this is family... but also keep in mind we don't get along perfectly.  What would Funcoland give her?  
Thanks All!