Amazon offers the
Cooper-Atkins 2560 Digital Refrigerator/Freezer Thermometer for $13.25. Clip the
75-cent off coupon on the product page to cut it to
$12.50. Pus, Prime members bag
free shipping. (Non-members can spend $35 or more to qualify for
free shipping; otherwise,
shipping costs $5.01.) That's the lowest total price we could find by $11. It measures temperature from -22 to +122 degrees F and features a high/low temperature memory.