If you check craigslist in the cities surrounding your state, you might find one.
There always seems to be at least one for sale in Chicago......
Go to @
http://chicago.craigslist.org/
Go to the yellow "Search" box in the upper left corner...
Enter keyword (such as "roadmaster")
Scroll down in the box under labeled "community" until you reach the
"sale/wanted" category
Do your search..... Change cities/states from the list on the right by clicking on that city or state and repeat.
Good luck!