Latest update shows that 30cm Scribing Ruler with 90 Degrees Scale costs $9.99 (in Banggood). Check coupons or create price alert down below. Let’s see what best price is ATM.
30cm Scribing Ruler with 90 Degrees Scale High Precision Measuring and Marking Gauge Woodworking Essential Tools Sturdy and Durable Great for DIY Projects
Latest coupon and price update (UTC):
Banggood ($9.99)
Banggood warehouse is located in China. Hmmm… There is no active coupon in Banggood at this moment. Price? From what I can see this price is higher than average price ($8.99).
Link: Banggood product page
Price: $9.99
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
Here is price history (for all/most countries) for 30cm Scribing Ruler with 90 Degrees Scale.
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)).