$494.99 – , Version: Non-LBT/LBT Version, Item Name: X20S Transmitter with R8 Pro R9 MX Receiver & Hand Grips, Model: X20S Transmitter/X20S Transmitter with R8 Pro R9 MX Receiver & Hand Grips (Optional), Color: Blue/Black, Model: X20S, Weight: 2500g, Mode: Mode 2 (Left Hand Throttle), Brand Name: FrSky.
$494.99 – that is current price with coupon for FrSky Tandem X20S RC Transmitter (in Banggood). Go down and check coupons out. Remember to check price history if it is available. Do you want to know what the best price is?
Latest coupon and price update (UTC):
Banggood ($494.99)
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood. Price? Well, this price is higher than average price ($389.14)
Link: Banggood product page
Price: $494.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGRCRR9, BGCuponation10, BGRRCB10, BG4b88a7, BG6c08a2, BGc4bd33, BGaeeb43
(there’s a little possibility that old coupon will work)
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.
Price history and price alert
Check out price history chart (for all/most countries) for FrSky Tandem X20S RC Transmitter. The lowest price was: $386.99.
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)).