I just picked up a 20 cubic foot chest freezer off of craigslist. I was excited to see how good of shape it is in. In case others are wondering how much a 20 cubic foot freezer will hold I can fit 6 6.5 gallon carboys in the bottom, not including the compressor hump. Or I can fit 12 cornys and a 5lb co2 tank also with out putting anything on the compressor hump. With a collar i might be able to add an additional 3 cornys but 2 more for sure. Hopefully in a month or two I will have the time to build a collar and put some taps on it.