Most countries other than the US do not value Doubled dies the way that we do. You could put it on ebay and see what becomes of it. But it may only go for a couple of dollars depending on how many are out there. You could build your post here and then try to sell it as best offer in the buy sell forum on CT. You might do a little better. It will all depend on the agreement that you make with the buyer. It is a real neat coin. A lot of other countries will keep using a die that is doubled, instead of retiring it. This leads to there being 10's of thousands if not hundreds of thousands. This drives the price down very quick.