Here is a list of the top 31 (most popular national) as well as the best and easiest automotive shopping portals where users can shop for cars for sale. The following list was gathered taking into consideration that the sites are not just aggregators or classifieds but have their own searchable inventory on site and users can inquire directly on site either by calling the seller directly or filling out an email lead form.
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Listed in alphabetical order by web address:
- www.autoblog.com – Get automotive news, reviews, car pictures and commentary.
- www.autobytel.com – Free no-obligation new car prices with thousands of used cars for sale.
- www.autoguide.com – New and used vehicle searches, news and automotive industry tools.
- www.autolist.com – Search multiple used car websites in one easy search.
- www.autotempest.com – Feeds in listings from a select few used car sites including Craigslist.
- www.autotrader.com – Find used and new cars for sale with car reviews and information.
- www.beepi.com – The new, fun way to buy or sell a car online. (Site disappeared.)
- www.car.com – Browse new and used cars for sale online at Car.com by AutoBytel.
- www.cargurus.com – Unbiased car reviews with price comparisons.
- www.carmax.com – Search new and used cars, research vehicle models, and compare cars.
- www.caranddriver.com – Car Reviews, Buyers Guides and shopping tools by Hearst.
- www.carfax.com – Used Car Listings with a Free CARFAX vehicle history reports.
- www.cars.com – New and Used Cars For Sale, Reviews, News Service.
- www.carsdirect.com – Search new and used cars and get help with auto financing.
- www.carsforsale.com – Searchable database of cars for sale by owner and dealer.
- www.carsoup.com – Nationwide used, new and certified car search engine.
- www.carvana.com – 360-degree views of cars delivered with a seven-day test drive.
- www.ebay.com – Ebay auction style bidding and buy-it-now options for used cars.
- www.edmunds.com – Browse by make and model, vehicle type, or price range.
- www.everycarlisted.com – Search car listings and receive free vehicle history reports.
- www.findcarsforsale.com – Find cars and trucks for sale within 100 miles of nationwide car dealers.
- www.iseecars.com – Pick the best car deal based on Stats and Analysis not your gut.
- www.jdpower.com/cars – Trusted source for car ratings and awards and now shopping.
- www.motortrend.com – Motor Trend magazine reviews, news and a shopping portal.
- www.motovy.com – Delivers competitive price quotes from dealers in a users area.
- www.nadaguides.com – Latest new car prices, deals, used car values, dealer quotes and CPO values.
- www.thecarconnection.com – Reviews, test drive results, specs and automotive news.
- www.truecar.com – See what others paid and get pricing on vehicles from TrueCar Certified Dealers.
- www.usedcars.com – Find your next used car at UsedCars.com by AutoBytel.
- www.vast.com – Nationwide used, new and certified car searches.
- www.vroom.com – Buy your next car online with Vroom. Free Delivery. Entire Process Online.
The following references were extremely helpful in this research:
-  http://www.popularmechanics.com/cars/a16593/best-sites-to-sell-your-car-online/
-  http://www.digitaltrends.com/cars/the-best-used-car-websites/
-  http://www.ebizmba.com/articles/car-websites
About The Author: John Colascione is Chief Executive Officer of Searchen Networks Inc. and Internet Advertising Inc. He specializes in Website Monetization, authored a ‘how to’ book called ‘‘Mastering Your Website’, and is a key player in several Internet related businesses through his search engine strategy company Searchen Networks®