Tail Shaft Diameter: 4mm, Item: X360 FBL RC Helicopter, Spindle Shaft Diameter: 5mm, Tail Rotor Diameter: 160mm, Tail Spindle Shaft Diameter: 3mm, max 48mm height, Tail Blade Length: 62mm, Main Shaft Diameter: 6mm, Main Rotor Diameter: 805mm, Weight: 580g (Kit), Channel: 6CH, Battery Compartment: 34*34*120mm, Motor: ALZRC 2525, Main Blade Length: 370mm, Motor Size: max 32mm diameter, Color: Red, ESC: ALZRCV4 50A.
Basically copy coupon, view price history or create e-mail price alert. Best price?
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.
Link: Banggood product page
1. ($213.37): Drones6
2. ($213.37): CouponsDE
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGAX36015, AFfbG10, BGBFAFF2019, BGCITYADS2019, bGpAnDacHeCk, BGX36012, BGAFF10OFF, BGTT10, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BGheli10, BgoFErTaSchInA10, BgcLuBofErtA10, BGCuponation10, BGDAVIS, BGHONEY2110, BGMATT7, BANGGOODSD, 6GSGIT
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for ALZRC X360 FBL 6CH RC Helicopter Kit With 2525 Motor V4 50A ESC. The lowest price was: $144.49.
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)).