As one of its daily deals, Best Buy via eBay offers the Rand McNally Tire Pressure Monitoring System for $19.99 with free shipping. That's $5 less than our mention from a month ago and the lowest price we've seen. (It's $10 off the current list price at Best Buy but we first saw it for $70 over a year ago.) It measures temperatures from -40°F to 257°F and pressures up to 80 PSI. Deal ends today.


Rand McNally Tire Pressure Monitoring System for $20 + free shipping