This is why I don't trust this companies and rather deal with them face to face, I went looking for offers on my X a few weeks back, had a little scratch, very minor on the side. The lady in Carphone Warehouse said shed offer me £200 for a 256G X, yes £200. I said to her politely you're crazy and left the store.
I then went to kings road on 2 weeks ago and sold my X to Carphone Warehouse £650, no questions asked. Yes I could of got more selling privately but didn't want the hassle. The First Lady asked why do you want to sell, I said I'm get the max once it was released. Go figure