Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – XDuoo X3II Music Player [EU] (-3 USD)
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. There are no active coupons for this product, but the price is pretty low isn’t it?
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): e2bcea, elec, BGCITYADS2019, 7bcdf9, BMPlayers, BGVDay10%off, BGAFF10OFF, BGTT10, bGhOnEy10, Email5, BGXDUOOX32, BGSS10%SW, 7d18f7, bgshOOp10, BGELIG0920, BG11SHOP, BG11PP12, BG11PP7, BGXDX3II12, 13f142, BGCuponation10, 6GSGIT, BGBRPL2, BGHOTSHOP15, BG53e9c8
(these codes were not working in latest coupon update, but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – XDuoo X3II Music Player [EU] (-3 USD)
Price history and price alert
Here is price history (for all/most countries) for XDuoo X3II Music Player.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).
Unfortunately, its price was increased to 127.9$. hopefully, there will be any coupon or deal on it soon, as I want to buy it soon