Shopping in Antalya is not done without precaution, don't expect every bargain to be up to the level of every salesman or -woman's smooth small talk.
Other travellers will have their experiences, but here are mine: Mock design brands are often in a quality that will not survive the first machine wash back home. Also, when browsing the many shops, you will get a feel that Antalya has an endless array of fashion, the truth is that most shops sell about the very same things, and there is a tendency that much is last years fashion. Or even older.
Perfume is sold at microscopic prices, pretending to be whatever you like it to be; illegally imported from foreign markets; stolen; excess products. None are true, it is all copy, and usually of very poor quality. This market seems to run thin now, from 2006 till 2008 several shops had stopped selling the crap.
How much you should pay compared to the stated price, nobody should ask me about. Should I pretend to be an expert, my impression is that a good price would be between 40 and 80% of the first indicated price.
So, here is my lesson. Unless you find something real cool, avoid the bazaars and head for the department stores along the pedestrian streets. They will not have anything stating Dolce & Gabbana, Playboy or Armani, but instead they sell products aiming at customers that will return angry if things don't survive the first, or even third, machine wash.