I have been experimenting purchasing zigbee and zwave devices from AliExpress, knowing there is a risk, somewhat mitigated by paying with a credit card.
I have purchased, over the last 2 months, about £200 of odds and sods.
All but one arrived quicker than the 40 day shipping promised.
I have run into one scam, that may cost me about £20.
Ordered a Tuya Temp Sensor from "Special Line-YW"
They took the order then alerted me to a long delay in shipping due to covid.
They then record on the Aliexpress that they have shipped the item.
This automatically blocks you from raising a dispute until the 40 day delivery window is closed.
They report it has shipped and message you to say they can't ship.
There is NO WAY to get to anyone in AliExpress so the only recourse is to document all the messages and attempts to get to AliExpress and file a dispute with the credit card company.
The devices are about half price so have saved about £200 and potentially lost £20, not entirely unexpected.
A lot of the things I have ordered I have not found for sale in the UK.
But has certainly soured the whole Aliexpress experience.
Just be aware of this scam they are running.