Just check coupons out (with price alert and history). What is the best price?
Battery: 3.7V 400mAh lithium-ion, Flying Time: 6-7mins, Package Contents: 1x Drone (Battery Included), 1x G-sensor Controller, 2x Spare Battery, 4x Spare Propeller, 1x USB Cable, 8x Landing Pad, 1x English Manual, 1x Waterproof Storage Bag
Aliexpress
There’re some similar (or not) items on Aliexpress
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. I found coupon for you. Check this out.
Link: Banggood product page
1. ($18.89): BGJJRCH37
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): aff7off, rchobbies8, PCNETWORK, e2bcea, quad20, AFfbG10, BGVDay10%off, BGRC902, bGhOnEy10, 13f142, BGCuponation10
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – JJRC H37 Mini Baby Elfie Drone with Two Batteries ($-3)
Price history and price alert
Do you need price history chart (for all/most countries) for JJRC H37 MINI BABY ELFIE With 4 Batteries? There we go.
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)).