Exwell via Amazon offers the Exwell Digital Tire Pressure Gauge for $29.99. Coupon code "6QOBDDLT" cuts it to $20.99. With free shipping, that's tied with our mention from two weeks ago and around $15 under what most third-party sellers are charging via eBay. It gives readings from 5 - 150PSI and features a digital backlit display and plug-type nozzle. Deal ends October 31.