PC Factory is one of the best stores for geeks. Here you can find a lot of tech that you can't find…read morein other stores. I recommend visiting the one located in Manuel Montt. It's a very big store. If you can't find what you're looking for, then it doesn't exist! Also, feel free to ask for advice, because the people there are really nice. You should check the special sales too. Sometimes, this store announces massive offers just for a day and people really get crazy. If you want to attend you will have to camp for a whole day or maybe two.