Just check coupons out (with price alert and history). What is the best price?
1600Pa strong suction power, 2600mAh Li-ion battery, Power: 50W, Dust box capacity: 640ml, Battery type: Built-in 2600mAh 18650 Li-ion battery
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
Fit For Rockrobo Vacuum V1/ Roborock S5 Max E3 S4 S5 S50 S6 Xiaomi 1S/ SDJQR01RR, SDJQR02RR Accessories Main Side Brush Filter | $4.94 | – |
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.
Link: Banggood product page
1. ($149.99): BGXWR
2. ($215.99): Wholesale20
put item in your cart and apply coupon code there 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): adf930, EU1911428, f0f489, BGXRBC106, BGXW209, BGXW208, BGXMXW208, BG205XW, BGRSXW, BGRBXW102, BGRBXWMC
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi Roborock Xiaowa Lite C102-00 Robot Vacuum Cleaner.
Price records source(s): Gearbest, 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)).