Just check coupons out (with price alert and history). What is best price?
Material EVA High elastic plastic Size 500x 239x 20 mm Color Grey Application Improve posture, protect the spine
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
Youpin Mijia LF U-Shape Neck Massage Pillow Relax Muscle Massager Release Pressure Help Sleep Pillow Work Home Car Travel Use | $22.90 | – |
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.
Link: Banggood product page
1. ($42.29): AFfbG10
2. ($42.29): BGBFAFF2019
3. ($43.70): aff7off
apply code in your basket (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): vipupgrade8, TTxBG10, bgssaff9, 502C6B
(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 LF Shaping Back Support? There we go.
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)).