I like to peruse http://www.homebrewfinds.com/ they occasionally have deals like the recent $55 for 2 ball lock from ebay, etc. Not exactly what you are asking for but it is a nice resource.
http://www.bvrgelements.com/category/Keg/ has them back in stock. Some guys a few weeks ago were talking how good the broken ones were as well. I'm thinking about ordering 2 to start my kegging empire...
Use craigslist.
The homebrew store I go to sells them with new gaskets for about $50, you can see them on craigslist for between $30 and $55. Throw in new gaskets and your set.