I have just checked coupons. The lowest price I could get is $9.99 for Enjoywood Line Scribe Ruler 45 90 Degree (in Banggood). Price history, coupons and price alert are available on this page. Do you want to know what the best price is?
Enjoywood Line Scribe Ruler 45 90 Degree Adjustable Stainless Steel Woodworking Tool Locator 12 Inch Length Versatile for Precise Measurement and Drawing
Latest price update (UTC time):
Banggood ($9.99)
Banggood warehouse is located in China. There are no coupons for this product in Banggood. I think you want to know if the price is good. This price is higher than average price ($8.99) for this item.
Link: Banggood product page
Price: $9.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGfc165c, BGbdd7f6
(I don’t think these’re gonna work, but you can try ’em out anyway)
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 Enjoywood Line Scribe Ruler 45 90 Degree 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)).