You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Flying time: 6-7min, Height: 77mm, Flying weight: 45.5g, Item no: K100, Rotor diameter: 245mm, Motor: 8520 coreless motor, Control Distance: About 120m, Battery: 3.7V 250mAh 25C li-po, Length: 245mm, Charging Time: About 30-60 Minutes
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. Only one coupon available!
Link: Banggood product page
1. ($71.71): BGheli3
you should apply the coupon 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): BGMAY020, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BgcLuBofErtA10, BGAFF10OFF, BGCuponation10, BGDAVIS, BGHONEY2110, Drones6, BANGGOODSD
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Do you need price history chart (for all/most countries) for XK K100 Falcom RC Helicopter BNF? 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)).