$11.99 – 10 Inch Precise Contour Gauge (Banggood, Aliexpress: Size 10Inch（254mm）, Color Orange, Package Weight 0.4 kg, Material ABS, Application Woodworking Tracing, Precision 0.01mm (the best price with coupon)).
I am monitoring price for 10 Inch Precise Contour Gauge and it is for $11.99 now (in Banggood). Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
Latest price update (UTC time):
Banggood ($11.99)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. Is it a low price? According to my database, the average price is $12.38 and current price is $11.99, so it’s probably a good price!
Link: Banggood product page
Price: $11.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BGherra, BGDRB18, BGd9ae1e, BGacc181, BGWT15
(there’s a little possibility that old coupon will work)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
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 10 Inch Precise Contour Gauge is here. The lowest price was: $9.99.
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)).