Kill A Watt for $20, $18 outside of TN
Newegg has the Kill A Watt for $17.99, plus TN sales tax if you live in the Volunteer State. If you have a PayPal account, use the coupon code PAYPAL10 to get free shipping.
Connect your appliances into the Kill A Watt, and assess how efficient they are. A large LCD display counts consumption by the Kilowatt-hour just like utility companies. You can figure out your electrical expenses by the hour, day, week, month, even an entire year. Monitor the quality of your power by displaying Voltage, Line Frequency, and Power Factor.
I’ve been wanting one for a while, but hadn’t been willing to pay $30 to $40 for one. I’m big on saving money spent on electricity, and I always wonder what the various desktops/servers/lights/entertainment devices around the Simer household cost us to leave on 24/7.
Edited to add: You snooze, you lose! The price as been set back at the original $25.