The board is not protected so it happens quite frequently - especially if your posting is in English language and you post an email address.
To post a positive example, I got a reply from someone in Uruguay for Wiking parts and paid by paypal. Never heard anything for 6 month, not even a reply to any further email. I was accepting the risk when making the payment so did not bother. By surprise, I received a package last month which obviously took more than 5 month to arrive (post stamps) + customs clearance as obviously cheapest postage does mean very slow sea freight... So now I am proud owner of a new carburator, rebuild kit and some other parts.