Well, I have been talking with contractors and engineers that work on older buildings from time to time looking for old wood flooring for some of my furniture builds. I had an engineer call me and tell me about some interior changes on a 1880's building and after some phone calls I found the person doing the work and got their approval to go through their trash container and take out the things I could use in the future. So, I found some pieces the cut of old floors with 2 x 12 as the support beams. The flooring was actually 3/4" x 5" pine, which was then covered with 3/4" x 2.5" pine and then covered with another 3/4" by 2.5" pine. They are not long pieces, but I think I can make them work with some good planning. Now to go back with a cordless saw and get all of the 2 x 12 boards that I can. Not sure what for, but I want them.
So dumpster diving is what I do in my spare 45 minutes each day. :-)