GameFly.com is having a pre-played game sale and offering some great titles at great prices. Some examples of their offers are; 

Breakdown (Xbox) - $6.99
Deus Ex: Invisible War (Xbox) - $8.99
Full Spectrum Warrior (Xbox) - $8.99
Metal Arms: Glitch in the System (Xbox) - $12.99
NFL Street (Xbox) - $8.99
Outlaw Golf 2 (Xbox) - $8.99
Riddick (Xbox) - $9.99
Splinter Cell Pandora Tomorrow (Xbox) - $13.99
Tom Clancy's Rainbow Six 3 (Xbox) - $8.99
Tron 2.0: Killer App - 12.99
The Suffering (Xbox) - $8.99
Van Helsing (Xbox) - 6.99

Also, for an even greater discount, you can sign-up for a free trial and you will also get a member discount. Once you are done ordering you are free to cancel online or able try out their service.

GameFly.com Pre-Played Game Sale

Thanks for the info, Jayson!