I recently sold my 2008 Fit with 45k miles for $11,000. You can do better than that for sure.
EDIT: I'll add, when I was buying the car, we were in a similar situation as we are now. The economic downturn had just hit and gas was $4/gallon. Used compact cars at the time cost almost as much as new ones, so I wound up buying a new Fit instead. Less features than a used car, but on the other hand, brand new with a warranty.
I didn't actually like the car though, which is the main reason why I sold it.
When you test drive it, pay attention to high speed gearing. The automatic has a much taller top gear so it actually gets better mileage than the manual. Also pay attention to ride quality.
Another plus to buying now is if you want to unload it in a few years, you'll be able to recoup most of your cash.