Advice needed on how to buy a website
 

I have seen a site I'd like to buy on www.adultsiteforsale.com but have no idea what to do next. :helpme

What is the process here? I'm worried about getting ripped off as the seller is in the US and I'm in Britain.

What's the best method of paying him to protect myself in case he tries to screw me? How does he transfer the domain to my name? And how do I get hold of his html pages, pics etc?

Any advice/info would be much appreciated.

Thanks :)