Hahaha good question, I always bargain 20% from the price they offer then usualy you will get about 10% less from the original price. If you bargain too much, You will not get what you wanted becoz, all the shop have the same price when you ask. Meaning, they all have set up among them for their selling price of each goods. I tried and at the end, I just get tired for walking around and not get anything lolz. experiance taught me not to bargain too much and I used to came back to the first shop that i went first for a good offer. Good luck man