There is no question that FL boats go cheap as many will have some problems. BUT not ALL!
The most common of course is a poor engine that was not taken out of service properly , but except for the real north where boats are hauled and yard serviced annually , it is a common problem anywhere. Esp if owner maintained.
This is why at times you see fairly new boats with "new engines" the owner was too lazy or ignorant to bother with taking care of them.
The other big FL problem is crap fuel in the tanks that are clogged with growth.
The dockside "fuel polishers" usually work well enough to sell the boat but are not a long term fix.
A hole cut in the tank and a good manual clean out is required , the parts are OTS to do this.
While tastes vary , I see some amazing bargains The $9000 trailer tug was one ($40,000 in yachtbrokerworld) and there have been many in the 35 ft range that sell for about $20K.
Sure, some need the teak deck overlay paint job removed , or the PH windows sealed , but so do most of the same brand , wherever kept.
At times the find is a boat with most of the work required on every old boat already finished , as it wont sell for that much more than the project boat.
Craigs list WANTED is a good resource.