You can create price alert here, copy coupons and view price history. What is best price?
Max Fan Flow Rate: 2.05 m³/min, Model: LW-01, Color: White, Power Rating: 4.3/4.9/5.9/7.5/8 W, Voltage: 5V, Power Supply: USB, Stand By Power Consumption: 0.12W, Brand: Loskii, Fan Sound Power Level: 27/29/31/34/35 dB(A), Max Air Speed: 2.2/2.6/3/3.3/3.4m/s, Service Value: 17 (m³/min)/W
Aliexpress
I could not find it 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 am tired of searching coupons, but I found one for you…
Link: Banggood product page
1. ($17.99): BGHU2289
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGAPLLK, BG692b59, BG142b55, BGDC7121, BGLWAinanas, BG34c035, BG7480c6, BGd64194, BGa03660, BG0f2e3e, BGDC0904, 2203ActiesNL, BGDC0333, BG1efeb0, 8Couponsde, MVC8SPRING, BG3fa516, BG59730a, BGCZSKFA, BGjuly1c, Cuponation9
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Loskii LW-01 Air Cooler.
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)).