my advise is before you buy a used boat have it checked out!!!!! If you do not know how to do a leak down test pay to have one done on the motor. If the guy is honest and it is a good boat he will have no problem with this. If you buy a boat and the motor is tired you will be spending a bunch of cash to rebuild the motor. Shinny parts, and new paint are cool but they do not mean a thing if the boat is sitting in your drive way with a cylinder head off the motor. The trailer can also bite you in the butt, does it need 4 new tires, are the springs rusted out? Check the bottom of the boat!!!! Is the hull bent up or the polly wore out at the back? A polly job will cost you 1500-3000!!! Oldest trick in the book is to sell a boat because the polly is wore paper thin.