Latest update shows that CNC 1610 2418 3018 Z Axis 775 Spindle Motor costs $69.99 (in Banggood). Just check coupons out (with price alert and history). Let’s see what best price is ATM.
CNC 1610 2418 3018 Z Axis 775 Spindle Motor Drill Chunk Integrated Set DIY Upgrade Kit CNC Parts for Laser Engraver
Latest coupon code price check (UTC time):
Banggood ($69.99)
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood. Is it a low price? From what I can see this price is higher than average price ($56.50).
Link: Banggood product page
Price: $69.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for CNC 1610 2418 3018 Z Axis 775 Spindle 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)).