Xiaomi Bluetooth 4.0 Speaker Silver (Banggood, Aliexpress: Bluetooth V4.0, connection range can be up to 5 meters, Built-in microphone for hands-free phone calls., rechargeable lithium battery which offers 4 hours of continuous playback. (the best price with coupon)).
Just check coupons out (with price alert and history). You probably want to know what is the best price?
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):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($16.37): BG11SHOP
2. ($16.99): 13f142
3. ($16.99): bgshOOp10
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): c767e1, 00c714, a5d15a, 3afd1f, 30XMBS, e2bcea, TTxBG10, BGAltabox, BGXM55, 2019SPEDM, aff7off, BG3CSUM, bgssaff9, AFfbG10, BGBS001, affbg10, 502C6B, BGCNXM3, BGBFAFF2019, BGCITYADS2019, BGVDay10%off, BGXMAA, BGAASRA, EARSP11, BGAFF10OFF, BGTT10, bGhOnEy10, BGXMS088, BGSS10%SW, BGELIG0920
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 2 another warehouse/versions!
1. China – Xiaomi Mi Mini Speaker Bluetooth 4.0 ($-3)
2. China – Xiaomi Mi Bluetooth 4.0 Speaker Golden ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi Bluetooth 4.0 Speaker Silver. The lowest price was: $6.99.
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)).