Guitar Hero 5 Bundle + $40 Amazon credit

Today only, Amazon.com offers the following Guitar Hero 5 bundles with a free $40 Amazon credit towards a future purchase. Plus, coupon code "BUY80G20" cuts an extra $20 off, making each bundle much lower than today's Walmart Saturday sale (which is in-store only). It's the best deal we've seen for Guitar Hero 5. The prices, all after the coupon and with free shipping:

• Guitar Hero 5 w/Guitar Kit for Wii + $40 Amazon credit for $78.99
• Guitar Hero 5 w/Guitar Kit for Xbox 360 + $40 Amazon credit for $78.99
• Guitar Hero 5 w/Guitar Kit for PS3 + $40 Amazon credit for $78.99
• Guitar Hero 5 w/Guitar Kit for PS2 + $40 Amazon credit for $68.99