My son is selling his $3,000 rowing shell and wants cash. (it is not on Ebay) The buyer says that is impractical and suggests Venmo.
On their website Venmo says it is intended for transactions among friends. It is not secure for transactions between strangers. So that is out.
How about Paypal? That is obviously for transactions between strangers. Yes?
Once he is paid, does he have the money with complete security, or can the buyer somehow dispute it?
(boat is sold "as is", so once the buyer picks it up, it is supposed to be entirely his problem)