Walmart has the Stanley FatMax 140-watt Power Inverter, model no. PCI140, bundled with a Bonus Keychain LED Light Light for $19.98 for a limited time. Shipping adds $5.97 or opt for in-store pickup to dodge the shipping cost.
This Stanley FatMax 140W Power Inverter plugs into a car cigarette lighter and features 2 AC outlets, 1amp USB port, 3-foot cable, and mounting kit.
Amazon has the Stanley FatMax 140-watt Power Inverter with 1 AC outlet and 2 USB Ports for $19.98 for a limited time. Shipping is Free for Prime Members or pad your order to $49 or more and score Free Super Saver Shipping.