Here in NE Iowa....
....I see at least a couple of Kirbys a month in the thrifts, as well as accessories. Usually they're marked from $15 to $25. They usually look complete (I confess that I'm no Kirby expert), and are marked "OK," meaning that they do power up. A friend of mine in Chicago pulled a minty G5 - shiny as hell - out of the Dumpster of his building; another resident had discarded it. It worked perfectly, needed nothing, and had evidently been Kirby-rebuilt at some point.
All of which goes to show that a lot of people out there have no clue that any vacuum is worth more than a new piece of plastic crappola from Mall Wart.