$39.99 – ZLL SG105 PRO WiFi FPV with 4K ESC HD Dual Camera 5-Side Obstacle Avoidance Optical Flow Positioning 20mins Flight Time Brushless Foldable RC Drone Quadcopter RTF – Two Batteries.
I have just checked coupons. The lowest price I could get is $39.99 for ZLL SG105 PRO Drone RTF with 2 Batteries (in Banggood). You can create price alert here, copy coupons and view price history. What is best price?
Latest coupon and price update (UTC):
Banggood ($39.99)
Banggood warehouse is located in China. There are no active coupons for this product, but the price is pretty low isn’t it? Is it good price? My database says that it’s pretty good price, coz average is $44.24.
Link: Banggood product page
Price: $39.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG8FORMULAMX
(these coupons are old, so probably won’t work)
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.
Price history and price alert
Here is price history (for all/most countries) for ZLL SG105 PRO Drone RTF with 2 Batteries. The lowest price was: $38.99.
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)).