Control Mode: 2.4G, Battery: 3.7V 700mAh 25C li-po, Product Size: 250mm(main rotor diameter)*232mm(length)*77mm(height), Control Distance: 150m, Charging Time: 30-60mins, Motor: 1106 11000KV brushless motor(main motor)8520 coreless motor(tail motor), Flying Weight: 85.5g, Flying Time: about 5 mins.
Price history, coupons and price alert are available on this page. You probably want to know 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 price update (UTC time):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
1. ($149.82): Drones6
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGXKK1241, BGheli10, BgoFErTaSchInA10, bGhOnEy10, BgcLuBofErtA10, BGAFF10OFF, BGCuponation10, BGHeli431, BGHONEY2110, BGDAVIS, BGMATT7
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – XK K124 EC145 3D6G RC Helicopter BNF with 4 Batteries [EU] ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for XK K124 EC145 3D6G RC Helicopter BNF with 4 Batteries. The lowest price was: $110.39.
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)).