+1 on Ritebrew. Great pricing on kegging supplies, faucets, etc.
For kegs, AIH ^, used (4-packs) or new. Austin or Homebrew Supply also have similar keg deals from time to time.
New kegs become used ones after a few times, especially when you travel with them.
Build your own keezer or kegerator. One of my friends has 12 taps coming through the wall, with 3 common, used (Craigslist) top freezer model fridges on the other side. Each hosts 4-5 kegs plus very cold storage in the freezer sections above.
Locally it's usually hard to find any brewing supply stores with decent pricing. Most are LHBS and their equipment tends to be much pricier than online. They won't sell you well used kegs for the going rate of $45-50 a piece, but demand $80 (or more) for those.
Look on Craigslist. And remember, Rome wasn't built overnight either, so take your time rounding up the right stuff.