I've occasionally met people to trade items through forums, since I'm in New York, and there are a lot of people around here, but most of my trades have been by mail and on the basis of mutual trust. I bought my Linhof Tech V 23b through a forum, wire transfer to Croatia and DHL to New York, no problems. Most of the people I've traded with on the forums have been willing to send goods before the funds are received, and I've done the same when purchasing, since these are people I've been conversing with online for years for the most part.