- Diamond Trail Sales, Inc is a quality pre-owned vehicle dealership that buys and sells all types of equipment. I concentrate on heavy trucks and trailers as well as medium duty. The inventory I stock is ever changing with fully inspected, ready to work trucks, and trailers. My goal is to provide you with the right equipment to do the work you require. Please contact me with any questions that you have, and let my years of experience go to work for you.