2018 New Xiaomi Mi Band 3 Black £17.60 w/ new account coupon at Aliexpress (Sold By Xiaomi Gshopper Store)

The new Xiaomi Mi band 3 black dropped further in price and is now £20.67 but Ali Express are running a £3.08 new account discount applied at checkout so works out at £17.60 paying by credit card (or £18.31 if paying by paypal)