John wrote:
Let me guess, you think he should take the seller's word for the
quality and quantity of maintenance it received. If it "looks" well
maintained, all it means that it's possible that the seller could
afford some spray paint and some degreaser.

Spray paint and degreaser doesn't do much for maintainence records,
compression tests, pressure leak down tests, etc. Research, ask his
mechanic about the motor, then have your mechanic look at it, if you
don't know what to look for.

Assume the worst, and hope for the best is the safest way to go.

Must be terrible going through life in such a negative manner.