http://cgi.ebay.com/Walker-Mower-/190427652401?pt=LH_DefaultDomain_0   
They are heavy. I have spent a a little time turning wrences on them, just keep the hydros clean, and mow away. 
They also have 1 and 2 stage snow throwers, edgers, pushing blades, buckets, gras catchers, ect.... 
Alot of them have V twins, so fab up a set of chrome straight pipes, enjoy the sound.   
If you hunt around, someone is usually selling them from thier lawn care business for a decent price.