BoatTrader.com features deals on used houseboats. Some other sites for finding deals on houseboats are Ebay.com, Oodle.com and iBoats.com. Each of these sites feature various listings for houseboats.
BoatTrader.com features the ability to sort boats by make and lets users search local listings by state. Additionally, the site features articles with guides on buying a boat.
Oodle.com is an online classified site which allows you to sort its boat listings by price, make and year. Additional search options include length, material and keyword.
iBoats.com is the largest boat-related site in North America. They offer many options for filtering listings, including by ZIP code, boat features and listing date. Each listing also includes a button for contacting the seller directly.