Here is the story in short(!);
someone shows up on the forum (a newcomer!) in order to have a item identyfied. After that was done he is offering it for sale.
Both are living on different continents. Agreements are made to pay with paypal.
After asking for seller's identity it seems that his messages are coming from a complete other adres (700 km distance from one to a other!) then the one he gave when asking for his identity.