Gamecrazy/ Hollywood video, they step it up this year with the 5$ sale that made place like gamestop rich and increase bussiness for all places who take trade-ins
Gamestop for me actually. I don't agree with a lot of their policies but they offered me some great deals which prompted me to find a local store which actually puts stickers on the outside of the case, not on the artwork.
Was very impressed with Gamefly this year, a consistent stream of reasonably priced used games that usually had free shipping. If they had a cart system and a little more reliability they would run away with this award.