Unlike many other wine shops owner picks suppliers according to their immediate quality. Necessary to taste as wines are not "McDonallds" style tuned to same taste, but really authentic, maturing, and when batch is finished is finished. Owner can help you a lot in selecting. You can bring your own bottle or buy there for 4 CZK 1,5 or 2 litres. Last time I checked litre was about 66 CZK so about 2,5€ of fresh wine which you would get in shop in bottle in range 4 - 10€ depedning on kind and harvest. English is not spoken, but foreigners are welcome :-)