Aliexpress
Click here… to search for Xiaomi Petkit Inductive Net Smell Cat Toilet on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
Coupon (156.39 USD): 7bcdf9
(CouponsFromChina.com tip: you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGCTJPB, AFfbG10, BGHOMEG12, BGMSPJP, BGAFF10OFF, BGTT10, bGhOnEy10, BGJJCWJP, bgshOOp10, BGHome15%, BgcLuBofErtA10, BGCuponation10
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi Petkit Inductive Net Smell Cat Toilet.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).