The inventory on the Gas Monkey Garage website varies but, as of April 2015, it contains both late-model vehicles, such as a 2014 Ford Mustang Boss 302S factory race car, and vintage vehicles like a 1957 Ford F100 SWB 4X4 truck. The latter was found in a barn and refurbished by Gas Monkey Garage.
Also among the offerings in the April 2015 inventory from Gas Monkey Garage is a 1949 Cadillac two-door fastback Sedanette, which was also referred to in its heyday as a Cadzilla. The garage also offers a 1957 GMC 4500 school bus, a 1953 Pontiac Chieftain Deluxe and a 1972 Plymouth GTX Roadrunner 440 4BBL four-speed, which is thought to be a rare one of one offering.
Gas Monkey garage lists both available and recently sold vehicles on its website. Among those sold are a 1966 Volvo P1800S sports couple, a 1986 Chevrolet Camaro 2-door Coupe Z2 with 9,282 original miles, and a 1973 SAAB Sonnet III. Other sold vehicles include a vintage 1955 Ford F-100 panel truck with a Ford-o-Matic transmission, a 1986 Citroen CX 25, and a 1969 Jaguar E-Type in original preserved condition. Gas Monkey Garage also sold a 1967 Ford F-100 SWB 6-cylinder 4-speed in its original condition, as of 2015.