I was given an Argon tank, took it to A Welder's Supply and for $45, I got a different tank of compressed Argon. They took my tank as a trade. I contacted A Welders yesterday. THey said their mixed gas MIG tanks are $280 and they are not selling any because they cannot get any from the manufacturer.You can lease or buy the cylinder, either way you exchange the bottle or if you own a bottle you can request them fill it. Just don’t buy a cylinder from someone else who doesn’t have proof of ownership. The gas supplier I use and I’ve talked to others won’t exchange a bottle that a different company leases unless you have a receipt of purchase. The bottle will have a company’s name on the neck. That’s when the receipts come in to play.
I am trying to find a tank to buy from another source and trade it for theirs. Clear enough?
Also, some companies don't fill their tanks at their shops. They send them off to get filled.