Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
– Double-edged Blade, – R-sharp Round Cutter Head, Net Weight 26g, Battery About 3 months, Rated power 2W, Rated Voltage 1.5V, Size 114x φ19mm, Features – High Speed Micro Motor, Material ABS + Stainless Steel, Rated Current 1A, – Removale & Washable Cutter Head, Color Black, Powered by 1x AAA battery (Not included)
Aliexpress
There’re some similar (or not) items on Aliexpress
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’m afraid that there’s no working coupon in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGSEE99, BGCITYADS2019, BG89DBG, BGBFI988, BGBGHFRI15, AFfbG10, BGPLO20, BGSEW98, 13f142, BGVDay10%off, BGHOMEG12, BGST95, BG303cv, BG93LI, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BGHome15%, BGHOMEA15%, BgcLuBofErtA10, BGSHOWSEE54, BGCuponation10, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, BANGGOODSD, 6GSGIT, BGHealth06, 00c906, BG00c906
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Price history (for all/most countries) for Xiaomi ShowSee C1-BK Electric Nose Hair Trimmer is here.
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)).