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Aliexpress
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Latest coupon and price update (UTC):
2x Cleaning Cloth, 1x Power Adapter, 1x Remote Controller, 1x Power Cord, Package Contents: 1x Window Cleaner (Battery Included with Safety Cord), 1x English Instruction Manual
Price history and price alert
Price history (for all/most countries) for Alfawise WS-860 Window Cleaner [Fast-08] is here.
Price records source(s): Gearbest
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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)).