Take two games to EB and get $25 off. There's an exclusion list which you'll have to consult beforehand.
I brought Atari Anthology (Xbox) which I found at Circuit City for $5 and Big Air Freestyle (got it "free" when I bought a Gamecube at EB), and got the $25 off.
I then traded in Burnout 3 (PS2) which is a game I had traded in 3 really cheap games to get at Blockbuster a month ago. It was worth $20.
Trades: $25 + $20
cash outlay: $8.50
=
Mercenaries for me!
Steve