Just check coupons out (with price alert and history). What is the best price?
Body weight: 67g, Remote control distance: WIFI: 30-40m, WIFI Camera Pixels: 0.3MP, Frequency: 2.4G, Battery: 3.7V (600mAh) (included), Gyro: 6-axis, Charging time: about 40 – 60 minutes, Quadcopter Size: 12.6*12.6*5cm, transmitter: 80-100m, Channel: 4CH, Box Size: 14*10.2*17cm, Flight time: about 6 minutes, Transmitter Power: 2x 1.5V AA battery(not included)
Aliexpress
There’re some similar (or not) items on Aliexpress
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. There are no active coupons for this product, but the price is pretty low isn’t it?
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGH42WH25, quad20, BGH42WH, AFfbG10, BGVDay10%off
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Price history (for all/most countries) for JJRC H42WH Butterfly Drone is here.
Price records source(s): Gearbest, 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)).