Well, I'm not sure I'd go through with this. I'm far from being an expert but it doesn't look good to me. For one thing, he's registered in the US so why the English phone number?
Also, on the surface his feedback looks good, but......a lot of his feedback is from buying, and he's not had much recent activity. Now he has these high ticket items for sale (over 13 more of those phones, and a camera worth over $1,000. No way I'd send this guy a dime.
It smells VERY VERY fishy to me. Run, run, run!!!