Check out free downloads with Binary Newsgroups. Most ISP's offer newsgroups with regular internet srvice. Some ISP's have good news services, some not. A good explanation of it all is
Slyck's Guide to The Newsgroups The nice thing about newsgroups is there's new stuff posted every day by people all around the globe. And the quality of MP3's is generally good as newsgroup posters are usually computer savvy.
To see what's available check out
alt.binaries.nl (Click on a group to see the lastest postings.)
Full list of MP3 groups available at Astraweb
Some of my favorites:
alt.binaries.sounds.mp3.1970s
alt.binaries.sounds.mp3.1980s
alt.binaries.sounds.mp3.classic-rock
alt.binaries.sounds.mp3.prog (progressive rock)
You'll need a binary news program to DL and decode the postings. There's many to choose from but I use
Grabit. It's free, does a good job and is fairly simple to setup and use. Probably the best is
Newsleecher. It's $30 but has alot of features and a smooth interface. If your ISP doesn't have a good news service (good retention and completeness of postings) you'll need to find a paid news service. The Slyck guide has a good listing of paid news services with user reviews.