At GMT Auto Sales West, our wide selection of dependable pre-owned vehicles offers plenty of variety to choose from, and thatâs what makes us one of the leading used car dealers in OâFallon, MO. From coupes and compacts to trucks and SUVs, we have something to fit just about every driverâs unique style and needs; including: sedans, coupes, SUVs, mini-vans, hatchbacks, trucks, and vans. We offer the following makes: Acura, Audi, BMW, Buick, Chevy, Chrysler, Dodge, Ford, Mercedes-Benz, Nissan, Cadillac, Jeep, Hyundai, and many more. We also offer financing services for our OFallon and St Charles used car customers. This not only includes competitive rates on auto loans, but also constantly changing specials. These valuable offers help drivers save when it comes to getting behind the wheel of a reliable vehicle.