Hi,

The account was sold to me for 0.75BTC.
https://bitcointalk.org/index.php?topic=979657.0

You could have PMed this account after you noticed it, and I would have noticed it and the deal would have been off.
I checked everything I could, recent posts (it was almost recent, so I naturally thought he was the original owner. But you could be an imposter, since you could simply set up everything after you see a Warning "Password has been changed recently")

The issue is not complicated as long as you do not provide a signed address from past quoted by someone, etc. If you provide that, then I am not sure what we will do.

I have been trying to contact the seller for quite some time without success. for a signed address.
He probably just went off and didn't login again.

PS Even if you could sign an address, can you prove that you did not sell to raindev? and changed your mind about that? Or wanted to get it back for free?
You could have simply put a negative trust or something to the account as soon as you noticed, and I could have known.