You can create price alert here, copy coupons and view price 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 coupon code price check (UTC time):
, Power consumption: 10g- about 100W, maybe a little difference), Cable length: about 1.25m (hand measure, 110V with USA plug), With Timer: 1h, Input voltage: 220V/ 110V, Material: stainless steel shell, (220V with European plug, Ozone production: 10g/h or 24g/h, 24g- about 120W
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
1. ($81.02): BG1efeb0
apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG6OZONE, BGAFF10OFF, bGhOnEy10, BGOZONE, BGCZOzone, BGdragonBoat, BGELIG0920, BgcLuBofErtA10, BGCuponation10, 13f142, BG5aa854, BGJP88377, BGHONEY2110, BG88377T, BANGGOODSD, BGd0b05d, BG86889d, BGca6355, BG1e0c07, ADMITAD2212, 2022ACTIESNL
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – 220V 24g/h O3 Ozone Generator [EU] ($-3)
Price history and price alert
Do you need price history chart (for all/most countries) for 220V 24g/h O3 Ozone Generator? 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)).