Kmart offers the Pulsar 1,600PSI Electric Pressure Washer, model no. PWE1600, for $71.99. Coupon code "KMARTMUST" cuts the price to $66.99. With free shipping, that's the lowest total price we could find by $56. Features include adjustable spray and a soap dispenser.

Update: The price has increased to $74.99 before coupon, $69.99 after.