Hi Mike, a number of us over here have been downloading (illegally) using "bit torrent", which enables you to grab full albums, and often full discographies of artists, with relative ease.   Honestly, I'm pretty surprised that a web savvy guy like you is hearing this from a webmoron like myself.

Basically to use bit torrent you have to download some bit torrent software into your PC, of which there are numerous available 0n the web (I use one called bit lord), and then visit one or more of the plethora of download sites (again, many many available, I tend to use isohunt, torrentz - which is a compendium of a bunch of sites), and start finding music.  You'll figure it out in about ten minutes max.

I've been using the sites for a couple of years, after Derek let me know about it, and it has kind of changed my life in terms of finding old music.  Personally I don't use it for new music but everyone has different degrees of morality about these things, and I would never suggest that mine is right or wrong.