Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database.
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): 135a02, vipupgrade8, f79746, TTxBG10, BGss8%hl, bgssaff9, AFfbG10, 502C6B, BGBFAFF2019, BGCITYADS2019, BGBGHFRI15, BGHOMEG12, BGMPB2020, BGAFF10OFF, bGhOnEy10, BGdragonBoat, bgshOOp10, BGHome15%, BGHOMEA15%, BgcLuBofErtA10, BGXPDE01, BGAFF7OFF, 13f142, BGCuponation10, BGMA3105, BGHONEY2110, BG10OFFAFF, BGwhielabel, BGJUY054, BGXPDC39, BG10OFFAFF1, BANGGOODSD
(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 Loskii-603 Anti-Mosquito Lamp is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).