Hey Swat!
I'm not sure if you were even considering a newer or even brand new car. BUT, there is one car that stands out if you are willing to put out the coin. The Prius Prime, its a plug in hybrid that goes about 25 miles on its charge, after that, is a standard prius that will return 52ish mpg.
The reason it stands out is because right now, in the north east US, Toyota is giving $4,000 of MSRP, AND you get a federal tax burden rebate of $4,502 (if you have a liability bill of more than that.)
Some folks in CA and CO I believe get another $5,000 incenttive from their states. Not bad for a $27,000 MSRP car. You will come out around $20,000 all in for one of those plus your individual state's rebate.
Just food for thought although, most will bring out the pitch forks for me for suggesting a new car. HAHA.