Aqara has a one day sale at Amazon in the US on a bunch of different items, most 10 to 20% off.
There is also a 10% voucher on a number of aqara items at Amazon in the UK, I don’t know if there’s a set expiration date on those, and they aren’t all the same models as the ones on the US sale.
The product descriptions will say that they need their own hub, and that is true if you want HomeKit integration. But since these devices are certified for Zigbee 3.0, many community members do use them with a smartthings hub instead although they may require custom code or have some idiosyncrasies.
If you are new to the brand, check the forum for discussions before making a purchase decision.
I personally use A number of aqara devices and like them very much, but I use them with HomeKit where they are very reliable