Amazon offers the Microsoft Xbox 360 E 4GB Console
bundled with a $50 Amazon Credit
with free shipping
. (The credit will show in your cart at checkout.) Even without the credit, that's $21 under the lowest total price we could find and the best offer we've seen for this console, which was released in June. It features 4GB internal memory, WiFi, wireless controller, 1 month of Xbox LIVE Gold.
Of note, the credit will be applied to your Amazon account within two days after your order ships.