According to my DB the lowest price is $127.99 for XK K110S 6CH 3D6G RC Helicopter RTF with 4 Batteries (in Banggood). You can create price alert here, copy coupons and view price history. You probably want to know what is the best price?
Control Distance: About 120m, Item weight: 60g, Remote controller: 2.4GHz mode 2, Model name: K110S, Color: Red, Item type: RC helicopter, Battery: 3.7V 450mAh battery, Gyroscope: Six axis, Tail Rotor Diameter: 36mm, Material: ABS, Body Length: 240mm, Motor: 1106 brushless motor, Item dimension: 245 * 48 * 77mm (with blade), Charging Time: About 50-60 minutes, Working Time: 5-7 minutes, Blade Diameter: 245mm, Channels: 6 Channels, Transmitter battery: 6 * 1.5V AA battery (not included), Brand name: WLtoys XK
Latest coupon and price update (UTC):
Banggood ($127.99)
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? This price is higher than average price ($114.78) for this item.
Link: Banggood product page
Price: $127.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG1b5477, BGheli010, BGb7005b, 2022ACTIESNL, BGheli3, BGe06516, BG7a5767, Tabby20, BGa3675d, BGJP07909, BG00a07c, BG9ec78b, MVC8SPRING, BG47be8c, 8BGwbg2204, 8wEbgaInS5, pROMo8cuPoN, BG8RCToy, hoNEYbGdeAlS, BGToys1, BGRCT10, BGJUNEGSG9, DealBGimpact, Cuponation9, 9OFFSUMMER, BgGoodie9, BGMatt2022, BGToys8, BGGutscheine, BG8OFFCOUPON, TTBLACK5, BGSaleAD, BGToySale, BGAUGUST8, BGCAPITALOS8, BG8FORMULAMX
(these coupons are old, so probably won’t work)
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
XK K110S 6CH Brushless 3D6G System RC Helicopter RTF Mode 2 Compatible with FUTABA S-FHSS For Adult Kid Beginner | $171.36 | – |
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for XK K110S 6CH 3D6G RC Helicopter RTF with 4 Batteries.
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)).