You can create price alert here, copy coupons and view price history. You probably want to know what is the best price? Noise: 60dB, Battery capacity: 2600mAh, Voltage: 14.8V, Using time: 120 – 150 minutes, Dust box capacity: 350ml, Suction: 1200Pa, Battery type: Li-ion battery, Battery of remote control: 2x AAA battery (not included), Water tank capacity: 350ml
Aliexpress
There’re some similar (or not) items on Aliexpress
Check out price history chart (for all/most countries) for Dibea GT200 Robot Vacuum Cleaner.
Price records source(s): Gearbest Click on image to enlarge. You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).