This really is an art form, and especially at this souk, sellers will expect you to do so, and will therefore have a buffer of approximately 25% already in place. Therefore, the rule of thumb is to haggle for 25% less than the cited price, or to the price you can afford. Be mindful of rate of Gold per karat, which you can discover from lists posted throughout the souq, and make, which relates to the intricacies and craftsmanship associated with the jewellery. The price can change greatly where the design is concerned, so be sure to ask for different designs until you find one that fits your budget.