Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Mounting holes 30.5×30.5mm, TLM supported, 32bit ESC with BLHELI32 firmware, Supports damped light, Voltage output (VBAT), Supports 3-6S lipo input, runs double faster than F051, NO BEC, PWM input, Extra Cap needed for high current or 6s usage, F3 MCU, Supports oneshot / Multishot / Dshot PWM
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($49.49): BGHONEY2110
2. ($50.59): Parts8
this code has to be applied in your 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): AFfbG10, affbg10, BGWKAF32, BGAF44, BGAF39, BGWK32, BGAF32, BG3241, 502C6B, BG45AESC, BG12MRP, BGAFESC, BGGEPPart, BGHJW4, BGVDay10%off, BGWKTRO, BGAFF10OFF, bGhOnEy10, BGFurling32, BGdragonBoat, BGSS10%SW, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for Airbot Furling 32 3-6S 4x45A ESC with F3 MCU ADC Current Sensor.
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)).