You can create price alert here, copy coupons and view price history. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
yellow HEPA Filter Kit for Dibea UV-808 Handheld Vacuum Cleaner | $13.18 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Brand: Dibea, Model: UV-808, Power: 400W, Power Cord Length: 5m, Operation Method: Handheld, Voltage: 220V, Frequency: 50Hz, Working Principle: Ultraviolet Light
Banggood
Banggood warehouse is located in China. Only one coupon available!
Link: Banggood product page
1. ($83.15): BG10OFFAFF1
coupon code has to be applied in shop’s 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): BGHOMEA13, 7d18f7, 13f142, BG10OFFAFF, BGwhielabel
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for Dibea UV-808 Vacuum Cleaner is here.
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)).