Low, medium, high prices. Rome has got them all. The famous downtown roads like Via Condotti or Via del Corso host the worldwide known brands of Italian and International clothes, shoes and jewels. Very expensive of course. In general, the more you go into residential areas the lower the prices. Sales are in January and July. Most shops are closed on Sunday and Monday morning unless they are in the main commercial roads. Ask for prices before you buy or they might be  raised while you are paying. Bargaining is not common in shops. Beware of people selling counterfeited products on the walkabouts: if the police catches you, also the buyer will pay a hefty fine.