We all know that coins can be worth a fortune. But what about banknotes? Few of us realize that they can be worth a fortune as well. Collectible, rare, with errors or simply old. How much could banknotes from the times of the Polish People’s Republic (PRL) be worth? Can a 10 złoty banknote be sold for multiple times its face value? Take a look at the gallery and see if there are any banknotes hiding in your home that could significantly increase the size of your wallet!