They are fairly solid boats. Average performers but better than average build quality.
As with any used boat, check for soft wood in the transom, stringers (especially near the engine mounts) and floor supports.
As far as a waste of time - all boats are a waste of time. But the time you waste boating is lots of fun.
If the boat is in excellent structural and mechanical condition and you can get it for less than market value, then decide how well you like it. It it's a thumbs up, then go for it.