Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Item NO.: E511S, Transmitter Battery: 4x 1.5 AAA Battery (NOT Included), Camera Optional: 720P / 1080P / 5G WiFi 1080P, FOV: 120° Wide Angle, Frequency: 2.4G, Color: Black, R/C Distance: 200-300m, Gyro: 6 axis, Quadcopter Battery: 7.4V 1200mAh Lipo (Included), Flying time: 14-16mins, Channel: 4CH, Charging time: 120-150mins, Motor: 1020 Coreless Motor
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 coupons for this product in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Old coupons (from the oldest to the newest): PU15, AFfbG10, BGAFF10OFF, BGMPB2020, bGhOnEy10, BG11EACHINE, 7bcdf9, BGEachine2021, BGCuponation10, BG554a8d, BG7dbe52, BG577b1b, BG9c590a
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Eachine E511S GPS 720p Drone Three Batteries [EU] ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for Eachine E511S GPS 1080P Drone.
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)).