I'll suggest using cars.com and autotrader.com for retail searches, and try searchtempest.com for a mass Craigslist search. It let's you search all Craigslists within a specified distance from you.
Mine: 2006 Mazda3 s GT Hatch: 115k, Gray, Manual
Gone: 2002 SVT, #1654
Hers: 2012 Focus Ti Sedan: 55k, SGM, Manual