Racerstar Crazybee F3 Pro RC Flight Controller (Banggood, Aliexpress: BLHELI_S pass-through Ready, Built-in 5V 1A Buck / Boost with LC filter, CRAZYBEEF3 PRO FS Firmware target: CrazybeeF3FS, Built-in 5A(each) Blheli_S 4in1 ESC Dshot600 ready, Built-in SPI Flysky receiver with telemetry(D8/D16 switchable), 256K FLASH), Current meter scale set to 1175, Power supply: 1-2S battery input (DC 3.5-8.7V), Board size: 28.5 * 28.5MM, Built-in voltage detection, Sensor: MPU-6000(SPI connection), Heading LED Ready, Built-in Current meter Max 28A, MCU: STM32F303CCT6 (72MHZ, Weight: 4.2g, Built-in Betaflight OSD(SPI Control) (the best price with coupon)).
Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
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.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
1. ($35.40): bGhOnEy10
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/feV
Old coupons (from the oldest to the newest): RC34, 15OFFrotor, 502C6B, TTxBG10, AFfbG10
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for Racerstar Crazybee F3 Pro RC Flight Controller? There we go. The lowest price was: $32.39.
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)).