An older road bike that has some type of cromoly frame, and not a Huffy/Roadmaster/etc crap, with alloy rims and alloy crankset, in good riding condition, will bring at least $150. Then you go up with more desirable brands, better components, and better frame materials (a Tange 1 Champion frame bike is worth more than a generic cromoly framed bike).
Jim in Tampa can get more in his area than I can here.