My 21st was on Saturday, and I had a set of these, don't really understand what all the rave is about these to be honest, and I'm quite happy with my JVC headphones.
As the picture shows, they havent been opened and till in the plastic wrap.
Looking for sensible offers, as I googled them and the RRP is £349.
Here they are,

Beats Pro Headphones – Beats by Dr. Dre from Monster

And here are the ones in question,

I'd be happy with £200 posted which I think is fair, or if you would like to pick up, offers are accepted.
Im based in South Wales.