Question: what is the best used car search engine?
Answer: Autotrader.com. Because AutoTrader has been around since before the internet, its longstanding reputation has built up decades of trust. ... 
Edmunds.com. ... 
EnterpriseCarSales.com. ... 
Autotempest.com. ... 
Kbb.com (Kelley Blue Book site) ... 
CarGurus.com. ... 
Hemmings.com. ... 
Carsdirect.com.