I buy and sell a ton of Leica gear each year and am currently trying to obtain some of the best Leica R lenses . Not easy with the New M being touted as the coming of the "R" solution . Selling is no problem ..I insist on payment thru paypal and I follow all the rules on shipping etc .
But how about buying ? If the item is listed on ebay you have some protection thru paypal and your credit card company ..but they are looking for you to make a mistake . What if you buy off the forum . How can you pay and have any security ?
I have missed some great glass because my instincts tell me to avoid payments outside of the USA to private individuals .