What I've learnt from BigClive on YouTube is don't buy anything that plugs into the wall.

If it's low voltage then you should be fine. I'd still be wary of large lithium ion batteries, though.

You probably meant anything that plugs & stays plugged for extended periods of time.

I probably would hesitate to buy large-battery-powered things from them, for now. Like e-bike etc. Also would hesitate to replace my circuit breakers with zigbee circuit breakers that can also measure power real time, for example.

But there are a lot of good quality stuff that doesn't fit into the dangerous category.

I bought a lot of sensors/smart home stuff, small home stuff like drip irrigation tubes/drip heads, apple find-my compatible trackers, poe cameras, 80x80 fans, label maker tape, poe extender etc.

I dunno mate, I've bought a very popular 60W soldering iron for like 2.5 USD. It has a ceramic heater and a knob to adjust the temperature, the default tip it came with is great, and it's also easily disassemblable. It's far better in quality than anything I could've bought locally for the same price.