The very first thing to do is make sure the title and registration is correct, names match up with seller, no jumping title bs. I would do this BEFORE going to look at the boat. No point in looking if you can’t get it properly registered. If the seller doesn’t have the paperwork correct, I can imagine how they cared for the boat/motor/trailer.
Even if it’s a project boat, trying to get clear titles when all you have is a bill of sale is damn near impossible in some states, (Texas for one). And don’t let the seller bs you and tell you that it’s easy to just apply for a lost title-if it was that easy, why didn’t the seller just do it themselves? (It is easy if you actually own it, not so much if you don’t)
Visual keys on the boat and motor, pronounced scum line on the hull and motor that appears it is there permanently tells you it has stayed in the water a lot and never cleaned. If the hull has that and crazing on the bottom, you can figure the hull is a candidate for delamination. Those tiny cracks get water forced into them when the boat is running and can adsorb water while at rest. Lots of hull patches, walk away.
Half assed repainted motors-no thank you. Unless it’s really old why would a motor need to be repainted? I’ve seen early 90’s motors in perfect shape with just wear on the skeg that have a lot of hours on them, under the cowl they look brand new. But I’ve seen 10year old motors that look like crap, better look into Sea-Tow....
Lots of thing that don’t work but you’re told they are an easy fix...walk away.
Obviously checking the overall condition of the laminate is a must, tapping the hull with a plastic hammer, close visual inspection of both sides of the transom.
What does the bilge look like? God awful mess? Same with wiring. If the wiring looks like a child did it, beware.
Too many people get buyers fever and just have to get this great deal and completely ignore the time and money to get the boat right.
You can make a Tee chart and list all the positives on one side and the negatives on the other. List the estimated costs to correct all the issues and then factor all this into the book values and asking price.
It’s just like buying a car, house etc.