Brand: XIAOMI, Model: XMG20SYM, Connection method: Wireless receiver/Bluetooth/Wired, Port: Type-C, Battery specification: 830mAh lithium-ion battery, Input: 5V=1A, Working Temperature: 0~45C deg.
Check coupons or create price alert down below. Best price?
Aliexpress
I could not find it 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. One coupon is available. Cool!
Link: Banggood product page
1. ($26.99): BGacd2d7
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG404d6b, BG8FORMULAMX
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Gamepad Dual Mode Bluetooth Game Controller. The lowest price was: $26.99.
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)).