Have to do both.
Everything on my build except PSU and the very old monitor is bought on Taobao, mostly because of local stores have bad availability and/or pricing.
The old monitor I'm using has a dead pixel, and after my brother got a good cheap gaming monitor with no dead pixels (the AOG 24G2 I'm using), that starts our e-tail journey.
The local stores seldom stock AMD products even back when 5800X3D is the king of gaming, and during that time e-tail has a significant price advantage, so that is that.
However, there was a lot of hassle related to the defective GPU I bought on Taobao, (edit: local availability for AMD is much better now, although higher-tier AMD GPUs are still difficult to find) and the price difference is now negligible, so I'm almost certain that the next major purchases will be on local store.