You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Quantity: 4PC, Item No.: SIC 2207, KV: 2688KV, Brand: Racerstar
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. There are no active coupons for this product, but the price is pretty low isn’t it?
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
Old coupons (from the oldest to the newest): BGRASIC2, bGhOnEy10, BGdragonBoat, BGSIC709, BGSS10%SW, BGSIC721, BgoFErTaSchInA10, BgcLuBofErtA10, BG4WKSIC, BGSICBF, BG4SICHP, BGSICM1, BGSICM2, 7d18f7, BGAFF10OFF, BGCuponation10, BG4SICPRO, BGDAVIS, BG263cc1, BGHONEY2110, BG50SICP, BG35SICPTH, Parts8
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for 4Pcs Racerstar SIC 2207 2688KV RC Motor is here.
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)).