Go down and check coupons out. Remember to check price history if it is available. Best price?
Suction: 1200Pa, Water Tank Capacity: 0.3L, Working Time: about 150 minutes, Filter: Coarse Effect Net + Fine Filter + Fine Filter Cotton, Voltage: 100-240V/50-60Hz, Appointment Mode, Mopping Mode, Climbing Height: about 1.5cm, Battery Type: Li-ion battery, Fixed-point Cleaning, Brand: ILIFE, Application Area: 90-120m², Dust Box Capacity: 0.3L, Model: X660, Charging Time: <300 minutes, Motor: Brushless Motor, Battery Capacity: 2600mAh, Power: 22W, Cleaning Mode: Planned Cleaning
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. Only one coupon available!
Link: Banggood product page
1. ($281.15): BG10OFFAFF1
paste coupon code in your cart and click Apply 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, 7bcdf9, BG10OFFAFF, BGwhielabel
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for ILIFE X660 Robot Vacuum Cleaner.
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)).