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: 2004 Subaru WRX Wagon: 116k, WRB
Gone: 2002 SVT, #1654
Hers: 2012 Focus Ti Sedan: 67k, SGM, Manual