It is a very risky. This way no one will buy your wallet key. Many people have been cheated by such acts. There is no proof that you won't have a seed phrase. Later, if you want to sign your wallet again, you can. So don't fall prey to such scams. And here if you want to sell even with 95% offer then people will not buy wallet from you like this. I tell everyone that no one will be in danger by buying wallet keys like this. It is complete fraud.