really, no one does not know him personally?
I've traded with them via PayPal and could probably give you an e-mail address
and the according name used on paypal with it as an alternative way to contact them, although I'd rather not.
How much are we talking about here?
I've known xetsr to be reliable, they don't seem like the guy walking out of an open debt that easily.
I've traded multiple times with xetsr via pp and know his email, but as mentioned in op he not respond me.
"personaly" I means outside this forum, in real life.