Etekcity via Amazon offers its Etekcity 230-PSI Digital Tire Pressure Gauge for $19.99. Coupon code "V94IIY5U" cuts the price to $13.99. With free shipping, that's $6 off and the lowest price we could find. It features a backlit LCD screen, air bleed button, 360° swivel chuck and air hose, and 45° extended tip. Deal ends February 1.