need a used computer source for 'visitor's laptop'

Fellas, I am looking for an 'internet only' laptop to have for use by the in-laws, parents and other random visitors. I obviously don't want to put too much in this as it will not be used very much, and also do not want to look on ebay.

In my area, craigslist is poor at best, no real mom and pop shops - so I turn here.

I have very few requirements - looking for a PC, DVD drive would be nice, not required, Integrated wireless (G) preferred, and enough processor / RAM to surf the web.

Anyone know of a decent spot?

Not going to post this over on the 'other' forum as I think I am going to begin my full transition here...