commercial kegerators, you're just paying for someone to do the work for you. that's why $200 in parts and a fridge goes for $400.
well that and the fact that mis-drilling the fridge (hitting the freon line) gives you a useless box with a door that won't get cold anymore.
if you are 'handy' you can build your own, cheap.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10