Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
Coupon (96.68 USD): Parts8
(CouponsFromChina.com tip: 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
Old coupons (from the oldest to the newest): TTxBG10, aff7off, AFfbG10, BGVDay10%off, BGMPB2020, BGAFF10OFF, bGhOnEy10, BGHALLOWEEN, BgcLuBofErtA10, BGCuponation10, BGDAVIS, BGHONEY2110, 7bcdf9
(there’s a little possibility that old coupon will work)
Price history and price alert
Price history (for all/most countries) for Airbot RC OMNIBUS F4 V6 Furling32 35A 3-6S PDB is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).