Go down and check coupons out. Remember to check price history if it is available. Let’s see what best price is ATM.
Safety Rope Strength: 150 Kgf, UPS(Un-interrupt Power System): 20Mins, Automatic Cleaning Mode: 3 Modes, Power Consumption: 65W, Model: X6, Dimension: > 40cmx 40cm, Auto-finish: Yes, Brand: Liectroux, Frameless window: Yes, Material: ABS, Plug: CN, Cleaning Speed: 2.4 minutes / ㎡, Power Range: 100 – 240V, Available Window: Medium and large scale window
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 code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($258.20): hoNEYbGdeAlS
2. ($263.81): BG00c906
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): BGHome15%, BGWCLCTX6, BGHOMEAPP13, BGCNLCTX6, BGCNWRCGF, BGHOMEA13, BG11SHOP, BGAFF7OFF, 7bcdf9, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, BANGGOODSD, 00c906, ADMITAD2212, BGCityads10, BGHU1724, Terence, Tabby20, 2203ActiesNL, BG1efeb0, 8Couponsde, MVC8SPRING, pROMo8cuPoN
(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
Check out price history chart (for all/most countries) for Liectroux X6 Window Cleaning Robot.
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)).