you can find good weed in the street if you want,but I know there are several ''bars'' with resident dealer inside.One of these is http://www.chapeaurouge.cz/
also take a look here,it's the same kind of place:http://www.prague-life.com/drink/pub...ails/65-U_Sudu
Also take a look on webehigh.com
Hope it helped,have a nice journey
I have bought twice without any hassle from a dude called Bob.