I bought a watch on Delcampe in August, and it turned out that the seller was a scammer, BEWARE a lot of scammers on Delcampe, I've seen the same watch being sold by other users after. Interestingly, the accounts selling the watches (and probably other items) are accounts with ratings and history.
I noticed that I got scammed by the seller being suspended after the purchase. I immediately wrote Delcampoe customer support and asked what was happening, got an email saying that they currently have issues with staffing and it will take longer than usual.
The next day it turns out my account is also suspended, as the victim of the scam with 1500 EUR on the line.
One week later, still no reply from customer support.
One month later, without any reply from customer support, I initiate a chargeback with my credit card.
Two months later, still no reply. I get my money back from the credit card company.
Conclusion don't use this haven for scammers with no customer support.
(I never received a receipt for the transaction, but I can show the page I see now when I login - they are trying to get their money :D)