Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Adjustable tension & ratchet: Yes, Quad bearing: Yes, Sensor type: Hall Sensor, Linearity: Real-time (No delay), Easy mode adjustment, Size: 49*42*48mm, Adjustable vertical travel range: 38°—54°, Weight: 42g(±0.3g), Self-centering adjustment: Yes, Name: AG01 Mini CNC Hall Gimbal, Temperature range: -20°C-85°C, Working voltage: DC 3.3V
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood.
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): BGRADIORU
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for RadioMaster AG01 MINI CNC Hall Gimbal for TX12 / Zorro RC Transmitter? There we go.
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)).