This deal has ended.
Today only, Amazon has Sega Superstars Tennis for XBox 360 on sale for just $10.83. This features 16 characters and has received 4.5 out of 5 stars from its first three reviewers. Shipping is free with $25 and there is no sales tax (except KS, KY, ND, NY, WA). Compare this to $39 at Family Video.