I have checked all old coupons and price is $12.99 for GXservo QY3240MG 40KG Metal Gear Digital RC Servo (in Banggood). Basically copy coupon, view price history or create e-mail price alert. What is best price?
GXservo QY3240MG 40KG High Speed Metal Gear Large Torque Digital Servo For Rc Car Crawler Scx10 Trx4 1: 8/1: 10 Rc Car Truck Robot Parts
Latest price update (UTC time):
Banggood ($12.99)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. Is it expensive? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $12.49)
Link: Banggood product page
Price: $12.99
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
Check out price history chart (for all/most countries) for GXservo QY3240MG 40KG Metal Gear Digital RC Servo.
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)).