Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Xiaomi Guildford 6 Inch Smartphone Bag Black (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (8.54 USD): BGAFF10OFF
Coupon (8.54 USD): BGTRIP01
(CouponsFromChina.com tip: 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
Old coupons (from the oldest to the newest): 99a5c1, 7e7471, TTxBG10, BGOD1, AFfbG10, BGC15, BGVDay10%off, BGTS785, BGTS204, bGhOnEy10, BGdragonBoat
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Xiaomi Guildford 6 Inch Smartphone Bag Black (-3 USD)
Price history and price alert
Price history (for all/most countries) for Xiaomi Guildford 6 Inch Smartphone Bag Silver is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).