I've been looking on Craigslist for a while now. Around me, it's full of problem boats. Some examples include: boat was advertised as Hypalon, but is actually PVC, 8hp rated boat with 15hp motor, guy claims to have title, but actually has a statement of origin with no bill of sale, guy claims that the motor just has a dead battery, so I bring a battery & find that the motor starts with a sprits of starting fluid, but doesn't run after that, guy has title, but with someone else's name on it. Guy has no title. Boat has little wear & is said to have been stored "inside" for years, but the adhesive is cracking & the handles/oarlocks/D-rings are peeling off, Guy claims that motor runs well, but 200 yards into a test ride, the motor overheats & shuts down.
North of Broward, it seems to be mostly honest mistakes. The boats down around Miami, seem to include more genuine scams. These were boats priced in the $1,600-3,500 range.
Caveat Emptor