AlonsoBlake

where do i get the buyers and which channels do i use
what make the public interested or keen to buy them
what features should i highlight to probe the public to response to the advertisement

You don’t say what country you are in, but eBay has a separate category for commemorative coins that seems to work quite well. This makes your coins visible to collectors throughout the world.
It would be interesting to know what kind of commemorative coins you are talking about? US silver dollars? UK Five Pound coins? Other?

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