This has been going on since Saturday and ends June 17th.
There are 100's of games spanning PS2, PS3, PSP, Xbox, Xbox 360, PC, DS, GBA, and Gamecube. There is also the Wii Sports pack for 10 bucks and the 2.0 gigabyte Wii Memory card for 20 bucks! I bought a Wii Memory card; I couldn't pass it up.
Check out Gamestop.com for more deals of 25%-50% off.