Connection: 2.4GHz Wireless / Wired, Battery: 400 mAh rechargeable Lithium battery, Working Platform: Windows 7/10 or above / Android TV Box (Android 9.0 or above), Vibration Motors: Yes, Cable length (Wired Mode): 1.8 m / 5.91 ft, Product Size: 162x102x67 mm / 6.38×4.02×2.64 in.
Just check coupons out (with price alert and history). What is the 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 great coupon!
Link: Banggood product page
1. ($35.99): BG717000
put item in your cart and apply coupon code there 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): BG37e8b2, BGAlerabat5, BG4e5a88, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, BG52a497, BGb91390, BGVGAMES, BG48e3fc, Cuponation9, BGVDGA07
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Gamesir T3 Game Controller Gamepad. The lowest price was: $22.49.
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)).