QMTL via Amazon offers the Tacklife Classic Tire Pressure Gauge for $9.97. Coupon code "LKAY7E82" cuts that to $6.98. Plus, Prime members receive free shipping. That's $13 off list and the lowest price we could find. It features four reading settings (PSI, bar, kg/cm2, and kpa), zero to 100-PSI range, and a backlit display.