At Best Buy, buy two used video games and get a third used video game (of equal or lesser value) for free. (The discount applies automatically in-cart when you add three eligible games.) Plus, many bundles qualify for free shipping. That's tied with our September mention and the third buy-two-get-one discount we've seen for used games from Best Buy this year. (For further comparison, we saw buy two, get two free on used Wii games in August.) Choose from used games for PlayStation 3, Xbox 360, Nintendo Wii, and more.
GameFly cuts $5 off each used game for PlayStation 3, Xbox 360, Nintendo Wii U, Nintendo DS, and other consoles. (The coupon should automatically apply in-cart; that makes it $5 off one game, $10 off two, $15 off three, and so on.) With many items qualifying for free shipping, that's the best compounding dollar-off coupon we've seen on these games from GameFly. (Shipping starts at $2.98 for those without free shipping.)
Of note, if you don't see the discount in-cart, apply coupon code "BFS2013ITEMONE".