They take your price that you want to sell it for and then mark your vehicle up and thats how they make money. Ive listed a few tms there and always ended up selling it somewhere else. I'm pretty sure if they arent making 1500 dollars they arent going to sell your tm. and YOU still have to show it to the customer, etc..
pacificvacuum.com is better, imo.
Make sure your rig is CLEAN. If the body has spots on it, touch them up. Take pictures of all the GOOD things. if it has new tires take a picture of the treads. Take a picture of the hours on the rig if they are pretty low. If you have kept good service records, say it has full service records.