You can buy used 18-wheeler trucks online through specialty trucking classifieds sites such as TruckPaper.com and CommercialTruckTrader.com, as well as through general classifieds sites such as Craigslist.org. Online truck dealers such as 18 Wheeler Truck and Trailer Sales also offer used trucks, as do auction sites such as eBay.
When browsing used 18-wheeler trucks on TruckPaper.com, you have the ability to sort listings based on criteria such as price range, mileage and manufacturer, as well as by the date on which the listings were created. If you see a listing for a truck that interests you, the site's built-in messaging system allows you to contact the seller with ease. You can also contact the owner on your own if he has listed a phone number or email address.
Craigslist requires all sellers using its site to provide a valid email address, though it does provide the ability to contact sellers via phone number as well. Listings for 18-wheeler trucks on the 18 Wheeler Truck and Trailer Sales site contain pictures of the trucks, as well as a description of their features and condition. Important aspects such as brake type, fuel type and cab options are listed in this section to give the buyer an overview of the options available.