Question: what is the best website to buy used cars in usa?
Answer: Cars.com. This site is still the gold standard for auto sales because they syndicate their listings so widely, and they have a huge inventory. ... 
AutoTrader. ... 
eBay Motors. ... 
Hemmings. ... 
Facebook Marketplace. ... 
CarGurus. ... 
TrueCar. ... 
Craigslist.