Northern Tool offers the Roughneck Portable Fuel Transfer Pump Kit for $159.99. Coupon code "255830" cuts the price to $139.99. Opt for in-store pickup to dodge the $18.49 shipping fee. That's $30 off list and the lowest price we could find. It features a 12-volt self-priming vane transfer pump, a built-in bypass valve, a closed-type 120-watt electric motor that delivers 24 amps, and 3/4" inlet and outlet ports.