GameStop coupon - 20% off in-stock used games

The weather might be beautiful now, but sooner or later a fall chill will approach. Be ready for fall evenings spent inside with new games from GameStop to occupy your time. You can find all sorts of titles in the pre-owned section (even recently released games - because you know someone will beat it within 24 hours of launch!). Save an extra 20% on used games that are in-stock with coupon code 20USED. Coupon is valid through 08/31/2011.