Amazon has DualShock 3 Wireless Controller for $38.49 with free shipping. Thanks leafsfan
ECA Members (currently free to join) may save an extra 10% making it $35, here is how:
1. If you do not have an ECA membership yet, click here and follow instructions to sign up
2. Click here, and request a unique Amazon coupon for 10% of most games
3. Add DualShock 3 Wireless Controller to cart
4. Checkout, and use coupon your requested in step 2
5. Your total will be $38 - 10% off coupon - $17 (free guitar discount) = $37 with free shipping