Well I suppose it depends on how badly you want to go to the concert. I was desperate to go to the o2 and took a risk on ebay which thankfully worked out, but although I would have been angry and upset, I knew it would have been my fault for doing it. Since then I have bought tickets from the official people and feel much better. But I do feel for people as its not nice, especially when you lose both money and tickets. But, thats the risk you take.

Fingers crossed you get tickets or a refund