Go down and check coupons out. Remember to check price history if it is available. Let’s see what best price is ATM.
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):
Voltage: DC 5V, #2: Battery capacity: 15000Mah(Optional), Optional Battery Capacity: 6000mAh/15000mAh, Charging Interface: Type-C Interface, DB: ＜80dB, Material: ABS PP, 2-Gear Using Time: 0.35H/0.8H, Charging Time: 4H/7H, 1-Gear Using Time: 0.5H/1H, Size: 20.5x 7.5x 13 cm/8.07″x 2.95″x 5.12″, Wind Speed: 70m/s, Power: 60W, Motor Speed: 45000 RPM
Banggood
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG107e34, BGherra, BGd4cc01, BG1826306, BGba1a31, BG0a3e9b, BGPL39971, BG7bf3cf, BG39bdee, BG60c2a2, BGa632e3, BGd3085c, BG9892a1, BG1006c, BANGGOODSD, BGe27fd1, 6GSGIT, BG8a7644, 00c906, BGdbc95b
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Cordless Keyboard Cleaner Air Duster 15000mAh [EU] ($-3)
Price history and price alert
Price history (for all/most countries) for Cordless Keyboard Cleaner Air Duster 15000mAh is here.
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)).