You can get Xiaomi MIJIA H501SE Hair Dryer for $49.99 using coupon code (in Banggood). You can create price alert here, copy coupons and view price history. You probably want to know what is the best price?
Xiaomi MIJIA H501SE Hair Dryer 200 Million Negative Ions /2 Levels Adjustment
Latest coupon code price check (UTC time):
Banggood ($49.99)
Banggood warehouse is located in China. There are no coupons for this product in Banggood. Good or bad price? Pretty good price – average ($64.59) is higher than current one!
Link: Banggood product page
Price: $49.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGBFDAY8, BGNEWYEAR8, BGESJY8
(these codes were not working in latest coupon update, but you can check them out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi MIJIA H501SE Hair Dryer.
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)).