1974 Honda 200 for parts only $200

http://indianapolis.craigslist.org/mcy/3714581530…

1975 CB125S Honda $200

http://indianapolis.craigslist.org/mcy/3715371428…

That's all I found in a quick look.

Not under $500, but it popped up. *shudders*

Motorcycle Trike - Sale or Trade

http://indianapolis.craigslist.org/mcy/3714862064…