i have a lot of account's without signed message because i never posted bitcoin address.
But i can sign a message.
It's not a problem.
NO.
you know when buyer see a bitcoin address posted they ask for signed message so you have deleted posts with bitcoin address from those account because they are hacked accounts and you can not sign message.
Now you have deleted posts with bitcoin address from those account and telling buyers they never posted bitcoin address
stop fooling buyers