Summary: A trusted way to buy cheap electronics from china.
I heard about GearBest on youtube from people that bought 3D printers like the Anet A8 Kit. Apparently you can get the best deal on GearBest, and they even have a warehouse on USA so you don't have to wait much time to receive it, if you are in the USA.
So, I bought a dashcam on December 31th, 2016 order number: W1612311153589220, user name Daniel, and it arrived in less than a week. I had a small problem with the power adapter not working and they intermediately send me a new power adapter for free. Ever since I bought several other things without issues. I don't know how was the customer support before, but right now is very good.
They give points (money) for buying and posting reviews on their website so they reward you for helping the community and you can use those points to pay up to 30% of any product. They also have promos often so you can get good deals.
I love to buy from other websites too, but if you want something cheap from china and want good support, just in case you have problems, I recommend you consider GearBest.