I'm fine, thanks!
Good card, yes. Good deal, no.
The seller is trying to recover the cash spent on it. If I were to buy an HD 6870 for that price, I would buy one new.
See if you can get him to lower it down to 95~105€, otherwise it is a bad deal.
For those 150€, the GTX560 Ti linked above is a better deal. (The card has considerably more performance)