When you find one, get an estimate first. I know over here it can be cheaper to buy a new suite that get an old one re-covered. I use a local Upholster for my business and have seen some of the suites he re-covers and sometimes am amazed at what people pay for this service, he is one of the most reasonably priced Upholsterers I know. Ask for fire retardant upholstery material, which is the law here but may not be in Turkey. Also it's a good idea to be there when the old material is removed in case new springs, or struts need to be used, this, again puts up the price. I know my guy brings in customers to show them worn parts that need replacing before he does the re-covering.
It would be interesting to know the costs in Turkey.