Restored as a member
Don't quote me on this but I think Warco was connected to the Huber co in Marion Ohio. I don't know who bought out who but there was some sort of connection.
I think this is an old Warco although not a tandem drive. Huber Museum in Marion
http://www.mariononline.com/hubermuseum/images/warco-road-maintainer.jpg
Restored as a member
Jim the ebay ad looks like the one here, but this is quite a ways out here from home, it may have been a cal trans machine, in pretty decent looking shape and I'm told it runs.