This deal has ended.
Buy.com has the PlayStation 3 DualShock 3 Wireless Controller priced at $40.95, a new low price (by $0.01). Shipping is free and there is no sales tax (except CA, MA, MD, TN). These are almost universally priced at $50 or more. They're well reviewed, receiving 4.5 out of 5 stars from over 40 buyers. If you're in one of these taxed states, check it out at Amazon for $0.01 more.