Aliexpress
Click here… to search for T-Motor MCK 2207 4-6S RC Motor on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (27.68 USD): BGAFF10OFF
Coupon (28.30 USD): Parts8
(CouponsFromChina.com tip: you should apply the coupon in your 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): TMCK, 502C6B, randy344, TTxBG10, bgssaff9, AFfbG10, BG12MRP, BGGEPPart, 0e7f33, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for T-Motor MCK 2207 4-6S RC Motor.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).