Here is a recording that makes a good example of playing a piece that you find on many audition lists: Barnum & Bailey's Favorite. This is one of the most famous circus marches ever written, to the point that it is almost iconic. It was written by bandleader (and euphonium player!) Karl King (1891-1971) in 1913.
Performance is by The United States Marine Band, surely one of the very best wind bands in the world. Enjoy!
Download the free MP3 of Barnum & Bailey's Favorite (March)
Also, some of the Marine Band's recordings are available commercially. Here are about 400+ titles you can get as MP3 files:
Marine Band Recordings
But there is history to this. During our nation's bicentennial, there was specific provision granted to sell some recordings:
http://www.gpo.gov/fdsys/granule/STA...nt-detail.html
However, that bill did not include the Coast Guard's recordings. But I think there was broader legislation later. I THINK there was a provision to share proceeds with the USO or some similar organization, but my memory is very hazy there.
If you look on Amazon you'll see quite a number of "classic" books have been republished (sometimes by more than one source) -- and this is actually good because (a) they're normally cheap, (b) they are often done in Kindle editions, and (c) they can be quite difficult to get otherwise since they may be out of publication and available only on the used book market. I've thought of doing this sort of thing myself a few times (adding some value as part of the process), but in each such case some cleverer person has beat me to it . I do continue to have this fantasy concerning one somewhat arcane book by Leibniz, but unfortunately it is in Latin and I am almost totally ignorant of Latin except for a grab bag of words and phrases.