$7.59 – Portable Wearable Negative Ion Air Purifier (Banggood, Aliexpress: Portable Wearable Negative Ion Air Purifier Neck Purifier 1.2 Billion Negative Ion Purifier Necklace Air Purifier with Digital Display – Black (the best price with coupon)).
When I was updating this page the price was $7.59 for Portable Wearable Negative Ion Air Purifier (in Banggood). Go down and check coupons out. Remember to check price history if it is available. Best price?
Latest price update (UTC time):
Banggood ($7.59)
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood. Is it a reasonable price for this item? Awesome! This price is the best in CouponsFromChina database!
Link: Banggood product page
Price: $7.59
This is the best price ever noted in my database!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG5883fe
(these coupons are old, so probably won’t work)
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
Here is price history (for all/most countries) for Portable Wearable Negative Ion Air Purifier. The lowest price was: $8.59.
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)).