I have just checked coupons. The lowest price I could get is $13.99 for Stainless Steel 45 Degree Miter Angle Corner Ruler [EU] (in Banggood). It is from European warehouse! Just check coupons out (with price alert and history). Let’s see what best price is ATM.
ENJOYWOOD Stainless Steel 45 Degree Miter Angle Corner Ruler Wide Base Gauge Woodworking Measuring Tools
Latest coupon and price update (UTC):
Banggood ($13.99)
Banggood warehouse is located in Europe 
. Too bad there’s no coupon right now in Banggood. The question is – is it a good price? I don’t really know if this price is reasonable, coz there’s no price history in my DB.
Link: Banggood product page
Price: $13.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG58757f, BGDRB18, BGWT15, BGc8412f, BGa0b557, BGd1bfb8, BGWDT15
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Stainless Steel 45 Degree Miter Angle Corner Ruler ($10.99)
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
It doesn’t make sense to generate price history chart, because there is one price record which is: $10.99.
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)).