When I was updating this page, then coupon price was 217.11 USD for T20 Gemini RC Controller (in Banggood). Just check coupons out (with price alert and history). What is the best price?
Latest coupon code price check (UTC time):
Banggood (217.11 USD)
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood. Good or bad price? This price is higher than average price (212.89 USD) for this item.
Link: Banggood product page
Price: 217.11 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGBFDAY8, BGNEWYEAR8
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Aliexpress
Click here… to search for Jumperrc T20 Gemini RC Controller ELRS 2.4GHz RDC90 on Aliexpress
Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for Jumperrc T20 Gemini RC Controller ELRS 2.4GHz RDC90.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).