There's a lot if theses scams about.
I responded to a national classifieds platform ad here recently, for an 'inherited' Mark 4.5, only to get a direct message from the admins to say it was hookie.
If it looks too good to be true, well...
I have seen alongside a fellow collector in Germany quite a few very suspicious offerings on ebay Kleinanzeigen. Sometimes not super low offerings but just enough to grab someone's attention... But with a closer look one can see the seller has a brand new account.