I am monitoring price for Mini Air Conditioner USB Rechargeable and it is for $8.99 now (in Banggood). You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Latest coupon code price check (UTC time):
Mini Air Conditioner USB Rechargeable with Nanotechnology Cooling Mist Powerful Motor 4-Speed Wind Adjustable Efficient Cooling and Humidifying Function Ideal for Home Office and Dorm – White
Banggood ($8.99)
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood. Is it a reasonable price for this item? From what I can see this price is higher than average price ($8.52).
Link: Banggood product page
Price: $8.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for Mini Air Conditioner USB Rechargeable? There we go.
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)).