If everything is in good working order that doesn't sound like a bad deal. The four stroke should be a solid motor if he took care of it properly. I would do a compression check on the motor, run it , check lower unit for water intrusion and make sure everything on it is functional. Also, if it has any wood in the floor or transom make sure it is solid. Check for soft spots unless you want to rip out flooring and replace wood and carpet in the near future. You can always fix or replace the little things like gauges, lights, bilge pumps etc. Those things aren't too awful expensive and if you are mechanically inclined at all they are an easy fix. Good luck!