Ten years ago trading in stuff at Funco was not only worth it, but actually profitable at times. You could literally broker games for a few hundred dollars a month in your spare time if you were devoted enough.
Nowadays though, f*ck that. EB, Gamestop, whatever rarely give more than $10 for anything more than 6 months old. Many times the trade-ins are less than $2. I'd donate the game to the Salvation Army, or just burn the thing in the fireplace before I sold it to EB for $0.75 and watch them turn around and put a $14 price tag on it. WTF am I going to do with $0.75?
Its still possible to get good deals at pawn shops, and small-time game stores but the mall places are just an outright screwjob. I have a friend who is totally addicted to wasting hundreds of dollars at EB this way. I just do not get it at all.