Most folks, by now, know to be suspicious of this kind of thing. My wife is looking at buying a high-end sewing machine (e.g. a Bernina). Apparently, these machines along with high-end bikes are a hotbed for scam artists. The story is almost always the same - I had to leave the country suddenly, and am selling my machine which I left with an escrow company in the US.
Both suggested escrow companies, but in both cases the escrow companies smelled bad. Here was one example link the "seller" sent us. This is unbelievably sketchy, merely a forum web post rather than an actual web site. Google searches quickly demolished the credibility of the escrow suggestions, and when we suggested an escrow company we knew to be legit, emails from the sellers ended.