Smallcar via Amazon offers Prime members the Smallcar Multi Angle Aluminum Measuring Ruler for $17.98. Coupon code "VNGH7C9I" cuts it to $9.89. With free shipping, that's $8 off and the lowest price we could find, although we saw it for a buck less two weeks ago. Deal ends March 1.

Update: The price has dropped to $9.98. The coupon has expired.