Hi , welcome to the forum
If you move this over to the collectibles section of the forum , you’ll get all the answers you need
https://bitcointalk.org/index.php?board=217.0Just a quick FYI - it would help your sale if you had a few pics of the front and back of the coin with your username and date.
Have a quick look around collectibles and you can see how sales/auctions are generally done .
Depending on wether your coin is graded, quality and specifics - hopefully you’d be looking at getting 1.1-1.2
BTCGood luck with your sale
Edit - beat me to it OmegaStarScream