Just check coupons out (with price alert and history). You probably want to know what is the best price?
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):
Unit Size: 170 X 100 X 210 MM, Operation Temperature: 5℃~40℃, Product Name: Mini medical Mesh Nebulizer, MMAD: ≤4.0 μm, Input Power: ≤ 2 W, Ambient Humidity: 15%~80% on operation, Storage Temperature: 10℃~40℃, Air Pressure: 86kPa~106kPa, Nebulization rate: Low: 0.15-0.3ml/min High: 0.3-0.5 ml/min 5.Noise: ≤35 dB(A) (at 1 meter distance), Unit Weight: 1.27 KG, Color: White & blue, Max Capacity of cup: 6ml (cc), Application: Hospital. Pharmacy /home /clinic, Power: DC5V，USB charging，Built-in 1300mh lithium battery
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): BG589b2e
(probably won’t work, but you can try them out)
Price history and price alert
Do you need price history chart (for all/most countries) for Portable Medical Nebulizer? 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)).