Just picked up three drums for $25 each and hope to start working on building my first UDS this weekend. Got a buddy that's a sheetmetal worker that will be fabricating the coal basket for me so this shouldn't involve much more than drilling a few holes. Pictures will definitely be posted.
For what it's worth the inside of these drums have been blasted clean with steel shot, have locking lids, and are in great shape. If you're in the KC area looking for a source, look up Consolidated Container Company down by Kemper Arena. Highly recommended.
"If I were just a bit more humble, I'd be perfect"