Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (14.88 USD): BGAFF10OFF
Coupon (14.88 USD): bGhOnEy10
Coupon (14.88 USD): BGdragonBoat
Coupon (15.21 USD): Parts8
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply 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): bgssaff9, AFfbG10, BGBFAFF2019, BGVDay10%off
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for Mamba 2207 1750/2650KV 4-6S RC Motor? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).