Xiaomi Knee Massager (Banggood, Aliexpress: Weight 800g, Model uLsp520, Heating temperature Low45±3℃, Massage cycle, Name Mini Knee Massager, Power supply mode Li battery, High55±3℃, Middle50±3℃, Size 189mmx168mmx144mm, Operating temperature 0℃-40℃ humidity≤80%, 15minutes, Color White (the best price with coupon)).
Just check coupons out (with price alert and history). You probably want to know what is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
1. ($169.28): BG10OFFAFF1
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): TTxBG10, BGOD1, AFfbG10, affbg10, 502C6B, BGBFAFF2019, BGCITYADS2019, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BGODFNJ1, BGODFNJ2, BgoFErTaSchInA10, BgcLuBofErtA10, BG19561, BGMASA01, BGCuponation10, 7bcdf9, BG10OFFAFF, BGwhielabel
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi Knee Massager? There we go. The lowest price was: $96.99.
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)).