I'm spoiled as I can just zoom down the road 30 minutes to HuaQianBei - probably the largest electronics market in the world. If I don't want to go there then Taobao is always a good option for me as everything is available and usually overnight delivery for less than $2.
The flower ball is at the entrance to the market buildings (about 30 buildings in the electronics area) and the tall, odd shaped, building is probably the most well known one in HQB, the SEG electronics building (pronounced "Sigh-Ga")
hqb (resized).jpghqb2 (resized).jpg