You can create price alert here, copy coupons and view price history. Best price?
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):
Model Type: Fixed-Wing/Glider/Helicopter, VA 73x39mm, 2.4GHz System: AFHDS 2A / AFDHS, Display: STNTransflective Display, Channel: 6-10 (Default 6), Chargeable: No, RF Range: 2.408-2.475GHz, LCD 128×64 Lattice, Power: 6V DC 1.5AA*4, Low Voltage Warning: < 4.2V, LCD with white backlight, Bandwidth: 500KHz, Size: 174x89x190mm, On-line Update: Yes, Color: Black, Weight: 392g, FCC ID: N4ZFLYSKYI6X, Stick Resolution 4096, Certificate: CE0678, DSC port: PS/2 Port PPM, Antenna Length: 26mm (Dual Antenna), RF Channel: 135, RF Power: < 20dBm, Modulation Type: GFSK
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($71.99): BGRADIORU
2. ($73.59): BGRCParts8
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): FSI6X, TTxBG10, Parts8, BGAFHDS, BGPAYPALSS, BGFI6X, 7d18f7, BGdei6x, 2020CNY, BGVDay10%off, aff7off, bGhOnEy10, BGflysky11, BGSS10%SW, bgshOOp10, BGI6X20, BGI6X3RUS, BGI6X3NE, BGESFKI6X, BGRCRR9, BGCuponation10, BGI6X3ES, BGDAVIS, 13f142, BGI6XUSA, BGi6XJuly, BG945762, BGradio9, BG70e5fc, BGGAL8, Tabby20, BG1efeb0, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5
(these coupons are old, so probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Flysky i6X RC Transmitter [EU/CZ] ($-3)
Price history and price alert
Do you need price history chart (for all/most countries) for Flysky i6X RC Transmitter? There we go.
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)).