GameStop is currently running their Cyber Week sale, that matches their Black Friday Buy 2 Get 1 Free sale on all retro games.
While that deal has already been posted, here are some example deals that use that promotion. These games are good for playing or collecting, as retro games seem to be back in style.
All are Original Xbox. (Most are backwards compatible with the Xbox 360)
Halo 2 $.99 + Free No Rush Shipping
Halo: Combat Evolved $.99 + Free No Rush Shipping
Grand Theft Auto III $1.99 + Free No Rush Shipping
Counter Strike $1.99 + Free No Rush Shipping
Half-Life 2 $1.99 + Free No Rush Shipping
Mortal Kombat: Deadly Alliance $1.99 + Free No Rush Shipping
Fable $1.99 + Free No Rush Shipping
https://www.gamestop.co