Right now Amazon has a super sale going on! Check out this Buy One Game, Get One 50% Off! of select Wii, PS3, XBox 360, DS, PSP, and other Games sale!! There are some great deals to find. Just pick two games and add them to your cart. You will automatically see the discount.
Some of my favorites are:
Super Paper Mario $19.99 ($9.99 with 50% off)
Wii Sports $19.96 ($9.98 with 50% off)
Toy Story 3 The Video Game $18.97 ($9.48 with 50% off)
Tons and tons of games! Let me know which ones are your favorite!