Black market exchange in Prague

I wouldn't give it a try if I were you. Sure, you might save some commission fees, but the risks are too high, I think.The people of the black market are often unscrupulous money launderers. You might get ripped off when they count the money, or you can get counterfeit money, or you might get simply lured into a dark corner and get robbed. The money men can be found on Mustek, near Wenceslas square, but I wouldn't do it!