This is a CP that I found on FW and looks pretty good since its back and its the lowest price around.
Retail List Price: $69.99
Current Sale Price: $53.99 + (Shipping)
You Save: $16.00 (23%)

After Price Comparison.....Amazon is still the Cheapest...see below for references sells them for $79.99 + (Shipping) sells the for $79.99 + (Shipping)
Wireless WiFi Network Adaptor for Xbox 360 - Microsoft - Toys "R" Us