I think there are many places for you to buy some old season sunglasses. Here is my several suggestions. First, you can go to some big shopping malls. As we know, many brands would deal with their old season sunglasses when the new arrivals come and the price is really reasonable and affordable for you. Secondly, you can also go to some online websites. These online stores often have some preferential activities. At last, I suggest you to go to some second-hand stores. You can find some surprises there. The sunglasses are really cheap and some are even quite new. You can definitely find some surprises there.