But what happen if the seller take back his account by proving the ownership of old address after sell the account to someone? Is it still possible right?
Please respond, I'm curious about this one.
No need to worry if the buyer have signed message from the seller when buying accounts, that would serve as proof of account transfer and he cant claim it back
If old buyer has a address staked, and it was not the one to send signed message I would guess it could still be taken back.
I have not heard of any situations of this happening. But if you stake a address with an account you should be able to recover it with help of mods and proving you own staked address.
So I would be careful as far as what address seller uses. I still would not suggest for anyone to buy an account.