This American SportWorks Quicksilver RX 136cc Go Kart originally $1,479.99 drops to only $1,049.99 at Sears. You save 29% off the retail price for this go kart. Add about $69.99 for shipping or choose free in-store pickup. This is the lowest price online by about $300, although we have seen this item go on sale for as low as $899. The Quicksilver Go Kart (3171B-15) features a 36cc 4-stroke engine, torque converter, full suspension, hydraulic brakes and can go up to 22-24 MPH. Sales tax is charged in most states.