This account created by yourself or you buy it from others ? I really could not believe that a Sr.Member without knowing how to sign a message. Moreover, you want to give up this forum. So I think that buyers will be more careful.Because of those deals like this may never see the seller again.
Negative feedback is not affect them. LOL !
So, I think you need to give out for more information !
I'm assuming you guys mean signing a message with a bitcoin address, but i'm not sure what that has to do with proving the legitimacy of my account.
I have multiple ways of proving that this was my personal account.
Signing the message from a Bitcoin address posted 5-6 month gives the buyer a idea that it was not claimed by anyone in last 5-6 months which means it a legal account not a hacked one and signing message also gives the buyer a kinda protection that he will not claim the account in near future and signed message will stop him to claim the sold account that's all why people ask for a signed message like this that the account belongs to me and I'm selling it for -- BTC.