I have an my spare co2 gas bottle for sale. It's the 3.5kg size which has 2.3kg of gas. I had it swapped at brew mart yesterday.
After $170 for it.
http://www.brewmart.com.au/brewmart-shop/catalogue/?detail&ItemID=1479&SZIDX=0&CCODE=17104&QOH=0&CATID=299&CLN=1
EDIT: Ive just made the price $170
After $170 for it.
http://www.brewmart.com.au/brewmart-shop/catalogue/?detail&ItemID=1479&SZIDX=0&CCODE=17104&QOH=0&CATID=299&CLN=1
EDIT: Ive just made the price $170