Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
Function: Sweep, Dirty Water Tank Capacity: 250 ml, Brand: SWDK(from XIAOMI YOUPIN), Charging Time: 3 hours, Working Time: 45 minutes, Roller Brush Speed: 380 ± 10% r/min, Model: DD1, Noise: ≤ 65dB, Battery Capacity: 2200mAh, Cleaning Areas: 120㎡, Cleaner Types: Floor Mop, Voltage: 110-240V, Water Tank Capacity: 400 ml, Battery Type: Li-ion battery, Material: ABS
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($174.69): aff7off
2. ($174.69): bGpAnDacHeCk
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGSDK, BGSWWK
(probably won’t work, but you can try them out)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi SWDK DD1 Electric Mop? There we go.
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)).