Just check coupons out (with price alert and history). You probably want to know what is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
SHRC HR SH5HD 3.7V Coreless Motor CW +CCW 2PCS for RC Quadcopter FPV Drone | $17.84 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Detailed Control Distance: 80~100m, Battery: 3.7V 750mAh
Price history and price alert
Check out price history chart (for all/most countries) for SH5HD RC Drone.
Price records source(s): Gearbest
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)).