All I can say is keep away from Scalpers. Beside the fact that you shouldn't support this, it also can happen that you pay for something that you never get. This is what happened to me last year in London. I didn't know that I bought from a Scalper because here in Germany Scalpers don't have an office and stand in the phone book. I payed a lot of money, flew to London and didn't get my ticket from this guy.

Fortunately I got a ticket for London from the record company that got to know what happened but I know of people who flew to London for nothing.

So IF you really want to buy on the "black market", go to the venue and buy there. Because there you get your ticket the moment you pay for it and maybe even find one for face value. That's what a pal of mine did in 2000. He was in Berlin for business reasons and in the evening he thought it was boring in a foreign city and that he could go to the BJ-concert that night. He went to the Waldbühne and got a ticket for face value from someone who had one ticket left.