I have just checked coupons. The lowest price I could get is $14.99 for WIIU Pro Wireless Game Controller for WiiU Pro U (in Banggood). Check coupons or create price alert down below. Do you want to know what the best price is?
WIIU Pro Wireless Game Controller Classic Joystick Gamepad with USB Cable for WiiU Pro U – Black
Latest coupon and price update (UTC):
Banggood ($14.99)
Banggood warehouse is located in China. There are no active coupons for this product, but the price is pretty low isn’t it? You probably want to know if this is a good price. The average price for this item is $15.09, so I think it’s a good price!
Link: Banggood product page
Price: $14.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for WIIU Pro Wireless Game Controller for WiiU Pro U? There we go.
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)).