The only time I visited Morocco in 1980 (so much fun I've never been back), there were no prices on anything and every purchase was the subject of discussion: "How much is a yoghurt?" "X dirham" What??!! "Y dirham" etc. Repeat for every purchase: "How much is a Coke? How much is a Fanta? How much is a barbary fig?" It's probably great if you've got bugger all to do all day and lots of energy for haggling. If you want to get on with your life, it's a complete pain in the arse.