I have a 0.1 BTC paper wallet that has not been touched since 2015, I don't know if it is any more valuable since its untouched ? Some one might want to offer some more for it, I don't know ?
What is stopping you from spending it yourself? This is a silly offer OP, no one will bite your offer. Just spend it yourself and stop trying to trick someone into buying something you can spend yourself since you also have the private key. Or someone else could buy it with enough knowledge to reverse any transaction you place after you spend it yourself. It can be double spent and in the end you lose. So just use it yourself, nothing good will come out of doing this.