You can get 300mm Precision L Square for 22.99 USD with coupon (from Banggood). Basically copy coupon, view price history or create e-mail price alert. Best price?
Latest coupon and price update (UTC):
Banggood (22.99 USD)
Banggood warehouse is located in China. As you can see I didn’t find any active coupon for this product right now… Isn’t it too expensive? Hmmm, price is higher than average (which is 20.99 USD right now), so better set price alert down below…
Link: Banggood product page
Price: 22.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGZB05, BG777d11, BGac1b0e, BGfd6c4a, BGUKSSWD, BG46cd23, BGHU0899, BGbe8e88, BG1c4472, BG0e285f, BGherra, BG230809, BGbcb921, BGd4a8e4, BG847d21, BG4baafc, BG694954, BG42759, BG2dbc9f, BG9b7715, BG02cf64, BG211b10, BGHID18, BGVEI20, BG50fea5, BGa0b557, BG51b269, BG51943, BGVEI15, BGVEIKO, BGWT15, BGWDT15, BG20236Tool, BGVeiko15, BGd1d5a6, BGa27cae
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – VEIKO Aluminum Alloy 300mm Precision L Square Ruler [EU] (-3 USD)
Aliexpress
Click here… to search for VEIKO Aluminum Alloy 300mm Precision L Square Ruler on Aliexpress
Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for VEIKO Aluminum Alloy 300mm Precision L Square Ruler.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).