Used Camry. 02-06 Is your best bet. Get the 4 banger, change oil every 3000 like you change underwear every night.
05-09 Pontiac G6 with the 3.5 v6. The 4 banger is trash. And you'll get better gas mileage. Plus you can add a flowmaster, which makes it sound awesome. Parts are cheap for both cars, and they can be had for less than $4,000.
If you want economy like a mo-of, Corolla. 06-10, but prepare to pay up for way better mileage.