Expand size: 29cmx 24cmx 5cm, Material: ABS, Channal: 4CH, Folded size: 13.5cmx5.5cmx 5cm, Flight system: Intelligent Height Setting, Camera Parameters: 4K HD pixel, PTZ perspective: 90 ° can be adjusted up and down, Flight Time: 8 mins, Color: Black/Grey(Option), Battery: 3.7V 1800mAh, R/C battery: 1.5V AA*3(not included), Charging Time: About 60 mins, Name: S91 RC Quadcopter Drone, Power data: Level 7 Wind Resistance, Frequency：2.4Ghz, Remote control distance: about 80 meters.
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 coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood.
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!
Additional Banggood coupons: first page and second page
Price history and price alert
Do you need price history chart (for all/most countries) for S91 Drone with 2 Batteries? There we go. The lowest price was: $20.99.
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)).