I have 3 used ball lock kegs that I am looking to sell for $50 apiece.
They are pretty much your standard used kegs. I replaced all the o-rings when I first purchased them so they are ready to be used for beer (though they are in need of cleaning).
These are for pick up only. If you come by and decide you don't like them, I won't be offended. I'll probably put them up on Craigslist in a few days if there's no interest here.