Truenotch wrote:I sell 2kg sized cylinders for $59ea in Argon, Argon/co2 and straight Co2 - regulator is $59 too.
Otherwise Techweld are dealing with a Hams based company who will sell you a bottle and refill when required.
the gas companies won't let you fill your own bottles anymore, only rent you one. cost me about $70 to fill my little bottle and it lasts a decent amount of welding. (i'm only doing small stuff though) and yeah $15/month rental. best thing is about this is if you know you're not going to have any use for it for a month or two they don't mibnd you dropping it in and picking another one up later so you don't have to pay for the rental.
if you are thinking of the 2kg disposable bottles, i have a regulator sitting round in the garage you can have for fark all. those bottles do run out real quick and the simple regulator makes it hard to judge the flow rate you are using.
if you don't already have a regulator for a normal gas bottle, expect to pay big $$ mine was about $500 all up and it is a basic one.