If you can get to Indy there are a ton of options.
Here's a few from the last two days:
NISHIKI BIKE AND SCHWINN FRAME

http://indianapolis.en.craigslist.org/bik/4430793826.html


Raleigh Arena Road Bike

http://indianapolis.en.craigslist.org/bik/4430321826.html



1982 Woman's Schwinn Varsity

http://indianapolis.en.craigslist.org/bik/4415524352.html



1980's Woman's Schwinn Traveler

http://indianapolis.en.craigslist.org/bik/4415532837.html



They seem to get updates about three times as much as Bloomington and infinitely more than Terre Haute, but I've had great luck.