At the hamsa marketplace is a so called escrow system. Idk if it is real.
BTW, do u know how I do get a PGP key?
That escrow system... even when there are real escrows behind... if the site decides to scam then they can shut escrows out and let it look like traders deal with escrows. Taking the bitcoin in escrow.
I think you should get a PGP key from
https://keybase.io/.