Average sale price: $14,830 ' Among vehicles in the price range, the Sentra's practically a luxury car. Its combined 27 miles per gallon lags behind pricier Sentras' 30 mpg efficiency, but its audio system has a jack for mobile devices, its interior is packed with power everything and its safety features are among the best in its class. It also helps that it's being offered by Nissan, which gave away an average of nearly $3,000 in incentives per vehicle last month. -- Written by Jason Notte in Boston. >To contact the writer of this article, click here: Jason Notte. >To follow the writer on Twitter, go to http://twitter.com/notteham. ' >To submit a news tip, send an email to: firstname.lastname@example.org. '