On 2010-07-16 auctions on the National Bank of Poland has been finished and issue's prices was established for coins commemorating the 90th Anniversary of the Battle of Warsaw.

Coin with the denomination 20 zł:
 - Reserve gross price: 134 pln
 - Max gross price: 140 pln
 - Selling price (price of issue): 134 pln
 - The number of coins to sell: 49.000 pcs
 - Total emission: 50.000 pcs
 - Date of issue: 2010-08-12

2010-08-09 is a date of issue coin with the denomination 2 zł and total mintage of 1.200.000 pieces.