Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 3 another warehouse/versions!
1. China – Astrolux K1 XP-G3+UV+Red Flashlight Silver (-3 USD)
2. China – Astrolux K1 XP-G3+UV+Red Flashlight Colorful (-3 USD)
3. China – Astrolux K1 XP-G3+UV+Red Flashlight Blue (-3 USD)
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood.
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!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): NWTO10R, 78da70, cmb1, CMBB, FLSTNE, BGAK1, M4BG, BGBFCR02, BGBFCR41, BGBFCR40, ECFKL, FMBG, AXMAS, BGAB20, BGASTROLUX, BGTORCH, BG1107YB, BG1107YR, BGFLS15, BGAST25, BGAFF10OFF, BGCuponation10, 4BLF, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, FIN4869, BANGGOODSD, 6GSGIT, BGTorch4, 00c906, BGXMAS58, BGtorch2, BGtorch3, BGAlerabat15, BGtorch7, BGAlerabatI
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 3 another warehouse/versions!
1. China – Astrolux K1 XP-G3+UV+Red Flashlight Silver (-3 USD)
2. China – Astrolux K1 XP-G3+UV+Red Flashlight Colorful (-3 USD)
3. China – Astrolux K1 XP-G3+UV+Red Flashlight Blue (-3 USD)
Price history and price alert
Price history (for all/most countries) for Astrolux K1 XP-G3+UV+Red Flashlight Black is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).