Either I just sold a domain for $400,000 to a 20 yr old tech unicorn or someone just did the biggest hack ever on my web site.
About an hour later he made a Facebook post saying the the purchase was an accident made with a credit card with no limit!
OK the answer is in, it is a 20-something year old tech unicorn with perhaps an unlimited credit card limit accidentally bought a very expensive domain from my web site, he says he was just researching domains and meant to purchase a different one etc etc………. no deal, ship