Pattern 20 Zlotych 1976 MW JMN "30 years of the budget laws of the PRC". Copper-Nickel (Poland, Peoples Republic)

Where can I sell the Pattern 20 Zlotych 1976 "30 years of the budget laws of the PRC" with the letters MW JMN, Copper-Nickel?

To sell the Pattern 20 Zlotych 1976 "30 years of the budget laws of the PRC" with the letters MW JMN, Copper-Nickel we recommend contacting specialized numismatic companies that hold regular auction sales. Public auctions are the most fair and secure way to sell valuable collectible coins. Go to the list of companies to find a suitable platform.