Check out the site but you could work on this.
2 kegs $120
bronco tap approx $20 complete
regulator approx $100
and a few bob for lines and bits and pieces so you wouldnt get alot of change out of $300 but your best bet would be to ring ross and have a chat and i think you will find him very pleasent to deal with, i know i always have and hes only to willing to help you out with advice and a great deal