Odd as it may seem, a used complete boat is cheaper than the parts to build one. I know there are always a few bad apples, but as a whole, the airboat family is very honest. Being close knit, no one wants to be labled by selling bad equipment. Most guys are selling boats to upgrade, not because there is something wrong with them. Look at the classifieds on this site as well as airboattrader.com. Chances are there is an airboat club in the area of the seller. You may be able to get opinions on a particular boat from people other than the owner. Airboat people are always more than willing to help. It may cost you a few wild goose chases looking at boats, but it will be far less than building from scratch and you will meet some great people. Lots of guys will also be willing to meet you half way to sell their boat. Also, don't know how close you are to Orange, TX... American Airboat is there. 800-241-6390. Good luck.