Product size: Φ 83mmh33mm, Rated voltage: 3.7V, Material: ABS.
Just check coupons out (with price alert and history). Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($48.87): 8wEbgaInS5
2. ($48.87): pROMo8cuPoN
3. ($49.40): 2203ActiesNL
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGSTHO15, BGHONEY2110, BGSHOM15, 13f142, BGSHE15, BGSmart6, 8BGwbg2204
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for Uah Cat Litter Box Air Purifier. The lowest price was: $33.14.
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)).