Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (45.89 USD): BGHONEY2110
Coupon (45.89 USD): BG10OFFAFF
Coupon (49.99 USD): 13f142
(CouponsFromChina.com tip: 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
Old coupons (from the oldest to the newest): BGHair2, BGPCS15, BGMIB2, vipupgrade8, 502C6B, BGbeauty001, bgshOOp10, BgoFErTaSchInA10, bGhOnEy10, BGSD52147, BgcLuBofErtA10, BGAFF10OFF, BGCuponation10
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for ZHIBAI Mini Anion Blower Hair Dryer is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).