Rated Voltage: 14.4V, Water Tank Capacity: 170ml, Mode: CDZB106CN, Battery Capacity: 2500~2600mAh, Mode: BLJ24W200120P-CA, Rated Output: 20V 1.2A, Charging Voltage: 20V, Rated Power: 45W, Charging Time: 4.5h, Battery Type: Li-ion Battery, Rated Input: 20V 1.2A, Mode: B106CN, Adapter: , Rated Output: 20V 1200mA, Rated Voltage: 100-240V, Suction Adjustment: 4gear, Suction: 4000Pa, Charging Base: , Robot Vacuum Cleaner 3C: , Water Volume Adjustment: 3gear, Runtime: 90mins, Dust Box Capacity: 300ml.
You can create price alert here, copy coupons and view price history. Do you want to know what the best price is?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
1. ($375.99): BG589b2e
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG622yb28, BGjuneBR3c, BGAHPU13, BGxiaomi3C, BGeaf456, TTBLACK5
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi Mijia 3C Robot Vacuum Cleaner. The lowest price was: $309.
Price records source(s): Banggood
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)).