Just check coupons out (with price alert and history). Best price?
Charging Time About 2 Hours, Off White, Model 3life-325 Electric Mosquito Swatter, Color White, Material ABS, Size 49x 21x 3.2 cm, Operating Voltage 3000V, Weight 300g, Rated Voltage DC 5V / 0.5A, Rated Capacity 3.7V DC 1200mAh
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
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: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): TTxBG10, BG3LIFE, BG3LIFEM, BGss8%hl, BGPSWA33, bgssaff9, AFfbG10, BG25GAGA, BGBFAFF2019, BGWAST14, BGCITYADS2019, BGBGHFRI15, bGpAnDacHeCk, 0e7f33, FBCOUPON1, BGTT10, BG15SWA, bGhOnEy10, BGAUG904, BGHome15%, BGAFF10OFF, BGCuponation10, BGDLZ3FE, 13f142, BGHONEY2110, BG10OFFAFF, BGwhielabel, BGJUN183, BGIS1004, BGXPDC35, BG10OFFAFF1, BGAU3006, BGDQXP40, BANGGOODSD, BGDU1146, BGHWGR9, 00c906, BG00c906, BGAlerabat1, Terence, Tabby20, 2203ActiesNL, BGHome15off, MVC8SPRING
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi 3life Electric Mosquito Swatter [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi 3life Electric Mosquito Swatter.
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)).