To sell your precious banknotes, experts recommend that you seek the expertise of a numismatic professional who will advise you in the process of selling your collection.
Auctions are the preferred method for collectors to sell their banknotes and coins.
To do this: send an email with several photos. If your banknotes or coins have value, they will respond to you with information on how the collection is sent, the sales commission, and the method and terms of payment.
Then you will send them the banknotes or coins, and they will take care of auctioning them off. There are several auction houses like Heritage Auctions.
You can also sell them on sites like ebay and auctiontime, at online collectors’ auctions, and at coin shops.
According to collectors, the two best seasons of the year to sell coins are the FUN show in January and the summer ANA from July to August.