Hmm..., I just did a private party search on any used Chevy Volt for a range of 100 miles from zip 90803 on three different used car search engines, usedcars.com, edmunds.com and cargurus.com. My search included the area from Santa Monica to the NW, Tijuana to the SE and Indio to the East, a pretty good market (Southern California) for Chevy volts.
I was unable to use usedcars.com or edmunds.com as they did not have a selection for the Model "Volt" when Make "Chevrolet" was selected. Cargurus.com only showed one, in Long Beach (Hacienda Beach) a 2011 listed for $34,500 (with no $7,500 tax credit).
Noob, how did you do your search?
2012 Volt, White Diamond Tricoat, Premium Trim Package (Light Neutral seats/Dark accents), Polished Aluminum Wheels, Bose Premium Audio System. Ordered Nov 4, 2011. Detroit-Hamtramck closed Dec 23-Feb 5, VIN: 1G1RF6E46CU114062, Delivered Mar 7, 2012