Do you feel somehow being taken advantage by some shops in Hong Kong when traveling especially Ladies Street and Temple Street in Mong Kok? Ladies Street, Temple Street and Jade Market is very popular amongst tourists. Do you know that you can negotiate at Ladies Street, Temple Street and Jade Market for the best price for the souvenir you like? Haggling is very common in those places among locals. Haggling is not my like but overpricing is no good. We may keep the savings for more enjoyment! For retail shops, we can update ourselves to protect our interest as well. e.g. Counterfeit.
More about the Hong Kong Consumer Council on Wikipedia.