Here's the total, so far, from my build:
chest freezer: $50
CL corny keg and co2 tank score: $70
Materials for collar: $50
4 Perlick faucets: $90
4 SS shanks: $70
CO2 regulator: $55
New o-rings: $20
SPENT SO FAR: $405 (damn that added up fast)
Still need to get:
CO2 tank filled: $25
Lines: $??? ($20 maybe?)
Ball-lock quick disconnects: $50
CO2 distribution manifold: $60
Temp controller: $35
STILL NEED TO SPEND: ~$190
Now, I've gone with the high quality Perlick taps so that I don't have to deal with any sticking issues, and I've building my keezer to fit 4 kegs, so the price of some parts is quadrupled.