Just check coupons out (with price alert and history). Let’s see what best price is ATM.
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):
Power: 40W, Voltage: 100-240V AC, Plug: EU, Noise: ≤ 64dB, Sweep, Water Tank Capacity: 100ml, Dust Box Capacity: 380ml, Model: BW-VC3, Function: Suction, Glass, Material: ABS, Vacuum, Cleaner Types: Vacuum Cleaner, Suction: 1600Pa
Banggood
Banggood warehouse is located in Hong Kong. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($182.69): BGHOMEA13
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGBWVC3, BGAFF7OFF, BGHCLE15, BGHKVC3, BGHKBVC3, bgshOOp10, BGBWHVC3, BGHOMEAPP12, BGHOMEAPP13, BGCZBWVC3, BGCZVC3, BGCZRBWVC3, BGCZWVC3, BGHKBWVC3A, BGHU0138, BGHKBWVC3R, BGCZRWVC3, BGBWHKVC3, BGHKBFVC3, BGCZBFBW3, BGCZRVC3, BGALIBUYWC3, BGCZFDCV3, BGCZBWVCDP3, BGCNNY72, BGCZBWVCG3, 10%ForBGBW, BGwhielabel, BGCZBWC3, 7bcdf9, BGCZPURVC3, BG10OFFAFF1, BGCZDVC3
(these codes were not working in latest coupon update, but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – BlitzWolf BW-VC3 Robot Vacuum Cleaner [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for BlitzWolf BW-VC3 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)).