Question: what is the best online used car site?
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.