Classifieds scams?

[AndiGer]

I saw the HP-19C yesterday in the evening.
Thought must be a scammer.
So I asked him today to send me a picture with the current date displayed and a picture with all 8 in the display. Half an hour later I received the message that the seller was blocked and the offer deleted.
I am always suspicious when a seller just opened the account as it was with this one. Yesterday opened the account and only the HP-19C advertised. And no real name ...

EDIT: Looked on different ebay country sites and on ricardo.ch but couldn't find the original offer.