$13.99 – Fit for refill 0.5mm, Size 200/300/400mm, Product name Marking Hole T Ruler, Hole diameter 0.5mm, Color Silver, Material: Stainless steel, Model number D98040, Every hole and slot distance 1mm / 0.5mm and 0.25mm.
When I was updating this page, then coupon price was $13.99 for Drillpro 200mm Stainless Steel Precision T-Ruler (in Banggood). Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Latest price update (UTC time):
Banggood ($13.99)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Is it cheap? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $12.49)
Link: Banggood product page
Price: $13.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BG17331, BGherra, BG07dc59, BGDRB18, BGdccf19, BGWT15, BGGines, BGc8412f, BGa0b557, BGWDT15, BGRA931, BGDBI0229
(these coupons are old, so probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Drillpro 200mm Stainless Steel Precision T-Ruler [EU] ($-3)
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
Here is price history (for all/most countries) for Drillpro 200mm Stainless Steel Precision T-Ruler. The lowest price was: $10.99.
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)).