I see a lot of users are selling forum accounts but they are unable to provide a valid signed message
don't buy such accounts without a signed message,if you are buying such accounts then you are taking risk of losing money/account nd reputation also encouraging them to get more hacked accounts and sell them(if they are real owners and legit sellers they can sign a message without any problem)
I am the legal owner of the account that is sold, I created it. but if there are no messages with bitcoin address the fact that I can sign in your opinion? and as mentioned escrow preferably
then its gonna be hard to sell it, also the price is too big in my opinion as for senior member you should lower the price