I have just checked coupons. The lowest price I could get is 86.09 USD for Hobby Rocket-RC 540 V6 (in Banggood). Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Latest coupon and price update (UTC):
Banggood (86.09 USD)
Banggood warehouse is located in China. Is it expensive? Actually this is the best price in history according to CouponsFromChina database! I found coupon for you. Check this out.
Link: Banggood product page
Price without coupon: 93.99 USD
Coupon (86.09 USD): BG9cd2c9
(CouponsFromChina.com tip: apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG8FORMULAMX
(probably won’t work, but you can try them out)
Aliexpress
Click here… to search for Surpass Hobby Rocket-RC 540 V6 Sensored Brushless RC Motor on Aliexpress
Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for Surpass Hobby Rocket-RC 540 V6 Sensored Brushless RC Motor.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).