You can create price alert here, copy coupons and view price history. You probably want to know what is the best price?
Frequency range: 2.408-2.475 GHz, Suitable for: cars, FS-GT5 Transmitter, FS-BS6 Receiver, Input power: 4.0-8.4V DC, Channel: 6, Frequency range: 2.408-2.475GHz, Built-in gyroscope stabilization system, Modulation method: GFSK, Channel: 6, Number of bands: 135, 2.4GHz system: AFHDS 2A, Transmitter Size: 27.8*20.8*12.5cm, Modulation method: GFSK, Antenna length: 26mm, boats, Low voltage alarm: AA batteries below 4.4V, Size: 30 * 22 * 16mm, 2.4GHz mode: AFHDS 2A, Transmission method: FHSS, 2S lithium batteries below 7.4V (not included)
Aliexpress
There’re some similar (or not) items 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.
Link: Banggood product page
1. ($77.39): BGRADIORU
2. ($80.83): BG00c906
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGFLYGT5, BGFlysky, BGss11%fly, AFfbG10, BGFSGT5, BGRCPART, 502C6B, BGBFAFF2019, BGCITYADS2019, BGVDay10%off, BGFS12, BG10PARTS, BGFKY11, bGhOnEy10, BGflysky11, BGdragonBoat, BGSS10%SW, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10, BGAFF10OFF, BGCuponation10, BGDAVIS, BGHONEY2110, Parts8, 00c906, BGRCParts8, BG1efeb0, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BG8RCToy, hoNEYbGdeAlS, BGToys1, BGRCT10, BGJUNEGSG9, DealBGimpact
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – FlySky FS-GT5 RC Remote Controller [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for FlySky FS-GT5 RC Remote Controller.
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)).