Check out the Kegconnection.com kits. You can add whatever part you want and shipping is a flat $7.95. The basic one-faucet fridge kit, a CO2 tank, and pin-lock keg will get to you for $202.85 shipped. You might be able to find parts cheaper elsewhere, but Kegconnection has great service and will ship to you fully assembled.
I just got a kit with an upgraded Taprite dual regulator (but no faucets, just picnic taps) for $267 shipped.
Check Craigslist for fridges, can usually find an old one for less than $100 (sometimes free if you're lucky/can fix a broken one).