My friend hasn't been able to stop or reverse the transfer, unfortunately Amar's warning was like a couple of days late :(. Nando (my friend) says the guy sounds British, polite and charming, the perfect set for a pro scammer. As soon as I receive all the data he's grabbed from him, not only pics, also a video where his audio system can be seen, I'll be posting it here.
It's going to be reported to the Spanish Police, but they say that for an offense under 3000UKP the British Police will do nothing. Looks like UK has been off the international police affairs as away as has been from the Euro and other european matters. He's looking at UK Police websites to see if there's any chance to involve them into this, and also contacting Ebay, truth is that he tried to close the deal using their check out system, but the scammer's configuration didn't allow it and he trusted to deal directly with him. Maybe he won't get his money back, but it's possible we can stop this weasel to scam more people.
We can set up a meeting in the UK then paying a visit to this guy