Three 5# CO2 tanks, two are Airgas exchanges, one is brand new. I'm using 20# tanks for everything now. +2x old regulators & one five port rail (with old school barb valves).
One old kego temperature controller I bought years ago that didn't work for the (non brewing) application.
Two dirty ~5gal old pin lock soda kegs that have been converted to Ball lock. They have an extra ball lock added to the lid that connects to a CO2 stone. I was using them as brite tanks for quick turn beers years ago but have eliminated that process. One I think is dirty, the other has a tag that its full of Star San (for an indeterminate period of time that is at least 2 years.)
$50
One old kego temperature controller I bought years ago that didn't work for the (non brewing) application.
Two dirty ~5gal old pin lock soda kegs that have been converted to Ball lock. They have an extra ball lock added to the lid that connects to a CO2 stone. I was using them as brite tanks for quick turn beers years ago but have eliminated that process. One I think is dirty, the other has a tag that its full of Star San (for an indeterminate period of time that is at least 2 years.)
$50