Sound <55db, Power Supply Type Liquid silicone, Size 137x43x30mm, Weight 120g, Host DC5V 5W, PPSU, Speed 4000R/Min, PP, Color Blue/Pink, ABS. Price history, coupons and price alert are available on this page. What is best price?
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 and price update (UTC):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
1. ($19.03): BGSHB7
apply code in your basket (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): ML15%Pro, vipupgrade8, BGMIB2, BGSR15, 0e7f33, FBCOUPON1
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi RUSHAN Baby Hair Clipper? There we go. The lowest price was: $17.9.
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)).