According to my DB the lowest price is $218.99 for ALZRC Devil 380 RC Helicopter Kit (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
Latest coupon code price check (UTC time):
Main Shaft Diameter: 8mm, Gross Weight: Appro 1500g, Spindle Shaft Diameter: 5mm, max 41mm height, Battery Compartment: 44*44*130mm, Tail Spindle Shaft Diameter: 3mm, Motor Size: max 41mm diameter, Main Blade Length: 380mm, Tail Blade Length: 75mm, Item: Devil 380 FAST RC Helicopter Kit, Weight: Appro 1100g(kit), Tail Shaft Diameter: 5mm, Main Rotor Diameter: 856mm, Packing Size: 55*20*13cm, Tail Rotor Diameter: 196mm, Channel: 6CH
Banggood ($218.99)
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood. Price? Well, this price is higher than average price ($207.29)
Link: Banggood product page
Price: $218.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG38011, TTxBG10, BGD38015, AFfbG10, BGVDay10%off, BGAFF10OFF, BGTT10, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BGheli10, BgoFErTaSchInA10, BgcLuBofErtA10, BGCuponation10, BGDAVIS, BGHONEY2110, BGMATT7, Drones6, BANGGOODSD, CouponsDE, BGd5ffdc, BGAUGUST8, BGCOUPERT8, BGCAPITALOS8, BG8FORMULAMX
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for ALZRC Devil 380 RC Helicopter Kit? 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)).