Let's say that you have a homebuilt aircraft for sale. It's got no POH, it's a single seater and is a tailwheel.
Someone views the aircraft, he has no, or limited tailwheel time, has never flown a small (twitchy) single seater and does not ask the 'right' questions.
Said person offers to buy the aircraft even though the vendor (you) points out the aircraft may be unsuitable for him.
Would you:
A: Decline his offer on the basis that you are worried he may come to grief.
B: Take the money and suggest he has some extra training before he collects it.
C: Stuff it, take the money - he's got a license and is a grown up after all. It’s not your responsibility...
All hypothetically of course
Kingy