Aliexpress
Click here… to search for Flysky FS-GT3C RC Transmitter on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. As you can see I didn’t find any active coupon for this product right now…
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG44OO99, AFfbG10, BG10UU45, BGRCPART, 502C6B, BGBFAFF2019, BGCITYADS2019, BGVDay10%off, BGFS12, BG10PARTS, BGFKY11, bGhOnEy10, BG464RA, BGAFF10OFF, BG1068QA, BGflysky11, BGdragonBoat, BGSS10%SW, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10, BGCuponation10, BGDAVIS, BGHONEY2110, Parts8, BGRCParts8
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Flysky FS-GT3C RC Transmitter.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).