Aliexpress
Click here… to search for Kemei KM-1990 Electric Rechargeable Hair Clipper Trimmer on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. Hmmm… There is no active coupon in Banggood at this moment.
Link: Banggood product page
Price: -3 USD
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!
Old coupons (from the oldest to the newest): 502C6B, HHHHHOT, healthylifestyle, vipupgrade8, 20%OFFSUMMER, ML15%Pro, BGSR15, BGHB20, bGhOnEy10, BgoFErTaSchInA10, BgcLuBofErtA10, BGAFF10OFF, 13f142, BGCuponation10, BGHONEY2110, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, BANGGOODSD, BGHealth06, BGgh0628d
(probably won’t work, but you can try them out)
Price history and price alert
Check out price history chart (for all/most countries) for Kemei KM-1990 Electric Rechargeable Hair Clipper Trimmer.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).