I'll try and remember the prices I actually paid for my stuff:
prices are in $AU
RAM: $300
CPU: $300
video card: $480
motherboard: $260
sound card: $195
wireless card: $80
antenna: $50
3x750Gb hard drives: $300 each ($900)
1x320GB drive: $130
WD 74GB Raptor: $200
PSU: $185
DVD burner: $50
case: $350
radiator: $200
fans: $60
waterblock: $90
pump: $150
monitor: $425
keyboard: $100
mouse: $80
HR-03 plus: $60
HR-05 SLI: $30
speakers: $400
headphones: $150
so in total, I would have paid roughly: $5225 (and that is money I worked for)
and that's only the parts that I'm actually using right now in my main rig