Price Plunge also offers the Def Jam Rapstar Bundle for PlayStation 3, Xbox 360, or Nintendo Wii for $5.99. The above coupon code cuts it to $5.69. With $3.49for shipping, that's the lowest total price we could find on any platform by at least $2. This bundle includes both the game and a microphone.
Update: All bundles and the PS3 version of the game are OOS.