Well, first of all, I would advise paying attention to such categories first:
The condition of the gel coat, whether the boat has osmosis;
Condition of the deckhouse, no cracks on the sides of the deckhouse;
Condition of the portholes;
Inspect the boat especially carefully in the widest part - of the boat has been neglected, you will notice cracks and bubbles on the gel coat, scratches, and dents on the sides;
I was looking for a yacht long enough to save money and be comfortable enough, my friend advised me to the website https://lookboat.com/ where I bought my perfect boat.
Also check the sails for chafing, mildew, and bad smells.
Don't hesitate to ask for a demonstration of how all the systems work.
Better yet, videotape it. Most buyers then can't remember how and where to turn it all on.