A friend of a friend of mine has an unregistered Honda Bros, about ten years old (I think), in reasonably good condition, and which he is offering to sell to me. My friend rode it for about six months in Chiang Mai without any problems (mechanical or police. The owner is in the USA and is returning in a week or so. I believe he has an invoice, but I'm not entirely sure as I haven't talked to him yet. I know the bike has no plates. Given this limited information, can anyone give me an idea of what is a reasonable price range? Should I even buy an unregistered bike? Is it possible to get third party insurance on an unregistered bike? Thanks for your help!