Whatever you want to buy, there’s a market or district for it in Hong Kong.
My favourite place was the Golden Computer Arcade, which I went to a few times. The arcade is a mall with lots of technology stores. You can buy anything you want to build a computer, fix a computer or have pretty much any electronic device fixed for you. I bought the odd (small) thing, but it was my favourite place to geek out.
There are also markets and areas specializing in clothes, bags and even a sports shoe district, where I bought some sandals. It was filled mostly with mainstream sports shoe shops and there weren’t many bargains.
One of the photos below shows minibuses. These are the speed demons I previously mentioned. I found them congregating near the sports shoe district.