Re: 18ft 1989 wellcraft center first purchase what do I look for
you won't need a manual for the boat.
Focus first on the condition of the motor (OB I assume) then the wiring then the trailer. If it's an 89 motor, budget to repower.
As long as there are no soft spots in the floor and the transom doesn't move, the hull should be OK.
All, assuming there are no obvious signs of serious neglect.