I regularly see grolsch bottles for about a dollar at the Karrinyup swapmeet. There was a 1/2 doz. Darwin stubbies for $12.00 ea last Sunday but i spent me money on a full sized CO2 bottle for thirty bucks and a high pressure reg. for $5. It was probably stolen and I'll go to gaol when I try fill it, but its worth a go. Got a pluto for $7.00 last year. He had two and stupid me could see no reason for more than one. Oh! well.