Suitable for: 4.7 inches to 6.5 inches mobile phones, Length: 58mm, Material: ABS&TPU&PP, Handlebar Diameter: 18-24&28-36MM, thickness<10mm, can be extented to 108mm, Brand: XIAOMI Ninebot, Color: Black. Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
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.
Link: Banggood product page
1. ($18.00): BGHONEY2110
2. ($18.00): BG10OFFAFF
3. ($18.00): BGwhielabel
4. ($19.00): 13f142
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/i1u
Old coupons (from the oldest to the newest): BgAuMotor, BGMS709, BGmotor9, BGHolder46, BGAutos, bGhOnEy10, BGCARELEC, BGINMO, BGCuponation10
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi SR-168 Phone Holder Mount. The lowest price was: $10.99.
Price records source(s): Gearbest, 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)).