Not REAL cheap, but there are still econoboxes. Deals can be had if you wait for previous MY and incentives.
Chevy Spark, MSRP 13k
Ford Fiesta S, MSRP 14k
Kia Rio, MSRP 14k
Dodge Dart, MSRP 16k
Hyundai Accent, MSRP 14k
Nissan Versa, MSRP 11k
Honda Fit, MSRP 15k
Mazda 3, MSRP 17k
I'm sure there are more, and if you wait for the deals you can walk out with a new car for a decent price. Problem is, people don't want an econobox anymore, they want a loaded SUV or luxury car.