Qualities vary greatly and I suggest you do research before buying... Also whatever they are asking ex: 1000 AED. Most likely you will be able to get it for 150-200... Be firm and threaten to walk away and even start to leave down the street and they will chase you. Don't think ANY offer they give you is a good one. Be firm from the beginning and just have the "take it or leave it" attitude and you will save a LOT of time!
I search for many replica watches on the markets and it is very important to do your homework as there are some high quality reps out there and also a lot of junk.