Rotor diameter: 244mm, Flying weirht: 79.5g, 8502 coreless tail motor, Height: 77mm, Length: 238mm, Charging time: 30-60min, Package size: 52.5*24.8*10.3cm, Battery: 3.7V 500mAh 25C li-po, Motor: 1106 11000KV brushless main motor, Flying time: About 5min, Control Distance: 150m.
Go down and check coupons out. Remember to check price history if it is available. What is the 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 and price update (UTC):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
1. ($112.70): Drones6
put item in your cart and apply coupon code there 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): BGSERVO111, bGhOnEy10, BGHFC10, BGXK12, BGdragonBoat, bgshOOp10, BGheli10, BgoFErTaSchInA10, BgcLuBofErtA10, BGAFF10OFF, BGCuponation10, 7bcdf9, BGHONEY2110, BGDAVIS
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for XK K123 AS350 3D6G RC Helicopter BNF. The lowest price was: $86.69.
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)).