Dessicant driers for flawless paint. Best for the money

I have "heatless" air dryer in my garage. It uses 2 large dessicant collumbs and it produces completely dry air. We use them to supply dry air for air pollution analyzers (used at power plants paper Mills etc ). My company was throwing them away, BRAND NEW IN THE BOX! It's cheaper than keeping them on the shelf and having to pay taxes on them