You can get Electric Circular Saw Guide Rail Cutting Machine Guide Ruler 400mm for $21.99 with coupon (from Banggood). Check coupons or create price alert down below. Let’s see what best price is ATM.
Electric Circular Saw Guide Rail Cutting Machine Guide Rail Ruler Guide for Woodworking Track Saw – 400mm
Latest price update (UTC time):
Banggood ($21.99)
Banggood warehouse is located in China. There is no active coupon in my database right now (for Banggood). Is it cheap? Looks like a good price to me (average is $23.28).
Link: Banggood product page
Price: $21.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG76cfa1
(there’s a little possibility that old coupon will work)
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
Do you need price history chart (for all/most countries) for Electric Circular Saw Guide Rail Cutting Machine Guide Ruler 400mm? 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)).