Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Item Name: Edge 540T, Length: 972mm/38.3inch, Take off weight: about 615g, Wingspan: 965MM/38inch, Wing Area: 21dm²
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.
Link: Banggood product page
1. ($161.99): BGHONEY2110
2. ($165.59): BGDAVIS
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): BG540T, BGBCFPV, BGAIRP12, Parts8, 502C6B, BGOTC20, BGBFAFF2019, BGCITYADS2019, 2020CNY, BGVDay10%off, BGMPB2020, bGhOnEy10, BGSS10%SW, bgshOOp10, BGRC902, BGTT10, BG11PP12, BGFPV-10, BGAFF10OFF, BGCuponation10
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for Upgraded Edge 540T PP 15E RC Airplane Kit? There we go.
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)).