I know that an auction would probably be the best way to get the most out of it. But there is a risk, that I do not want to take.
EU buyers are no problem. I will just book a cheap flight and deliver it personally.
But there are only a few non EU buyers that I will accept. Even with escrow the risk is to high.
Just choose an escrow and have them ship the coin for you. Then the buyer can't pull a fast one on you. It also protects the buyer from sellers sending empty envelopes. That 3rd party will have will be able to keep the deal honest.
I am willing to have this coin sent to me for any USA winner to verify and reship it. Chances are I will be the top bidder anyways so likely a moot point