Wireless Gamepad Bluetooth Six-axis Somatosensory Dual Vibration RGB (Banggood, Aliexpress: Wireless Gamepad Bluetooth Six-axis Somatosensory Dual Vibration Macro Programming with RGB for Switch – Transparent (the best price with coupon)).
Basically copy coupon, view price history or create e-mail price alert. Best price?
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. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($10.44): BGVGC8
you should apply the coupon in your 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/feV
Old coupons (from the oldest to the newest): BGf58253
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for Wireless Gamepad Bluetooth Six-axis Somatosensory Dual Vibration RGB is here. The lowest price was: $10.44.
Price records source(s): 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)).