Just check coupons out (with price alert and history). Do you want to know what the best price is?
Product Size 469*478*183mm/529*478*183mm, Women’S Wash Water Potential Adjustment Five-Speed Adjustment, Water Supply Temperature 5-35℃, Rated Voltage 220V / 50Hz, Type Long, Model KB2500, Use Environment 0-40℃, Washing Time For Women 1 Minute, Whether To Heat While Water Is In No, Laxative Cleaning Water Potential Adjustment Five-Speed Adjustment, Rated Power 600W, Heating Method Water Tank Heat Storage, Laxative Function Water Volume 0.4~0.6l/Min, Color White, Packing Size 540*490*230mm/570*490*230mm, Laxative Function Time 1 Minute, Female Washing Water Volume 0.4~0.6l/Min, Buttocks Washing Water Potential Adjustment Five-Speed Adjustment, Material ABS, Applicable Water Pressure 0.1mpa~0.75mpa, Inlet Water Temperature 15±2℃, Warm Water Heating Power 400W, Water Volume For Buttocks Washing 0.4~0.6l/Min, Buttocks Washing Time 1 Minute, Waterproof Rating IPX4, Operation Mode Single Control (Handle Button Operation)
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 and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($238.01): 8Couponsde
2. ($238.01): MVC8SPRING
3. ($240.60): 2203ActiesNL
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 and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGYJ048, BGHWDEALS888, bGhOnEy10, BgoFErTaSchInA10, BgcLuBofErtA10, BGYJ001, BGYJ047, BG12956, BGAFF10OFF, 7bcdf9, BGCuponation10, BGHONEY2110, BANGGOODSD, ADMITAD2212, 2022ACTIESNL, Terence, Tabby20, BG1efeb0
(there’s a little possibility that old coupon will work)
Price history and price alert
Check out price history chart (for all/most countries) for TSUGAMI KB2500 Smart Toilet Cover Seat.
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)).