Aliexpress
Click here… to search for LIECTROUX X5S Robot Vacuum Cleaner on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (303.90 USD): 8Couponsde
Coupon (303.90 USD): MVC8SPRING
Coupon (307.21 USD): 2203ActiesNL
Coupon (310.51 USD): BG00c906
(CouponsFromChina.com tip: this code has to be applied 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): BGCNLESX5, BGHOMEAPP13, BGHOMEA13, BGCNLCTX5, BG11SHOP, BGofertachinaX5S, 7bcdf9, BG10OFFAFF, BGwhielabel, BGCNX5S, BG10OFFAFF1, BANGGOODSD, BGCMHX5S, 6GSGIT, 00c906, ADMITAD2212, BGCityads10, Terence, Tabby20, BG1efeb0
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for LIECTROUX X5S Robot Vacuum Cleaner.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).