Every month Amazon sells 100+ albums in mp3 format for $5.00. It's why I've been doing most of my music shopping from Amazon rather than iTunes. It's a relatively inexpensive way to check out some really good music. Unlike the iTunes store, where a sale is a clue to crap, Amazon puts the good stuff on sale. For instance:
Raphael Saadiq, The Way I See It. Old School R & B. Saadiq's band backed Mick Jagger at the Grammys this year.
Lucinda Williams Little Honey I haven't heard anything of hers that I don't like. Sort of Americana/Country something.
John Coltrane, A Love Supreme Right?
Old Crow Medicine Show. O.C.M.S. Modern Bluegrass.
There's also greatest hits packages for the Ramones, Creedence, R.E.M., Patsy Cline, Ray Charles and others. I like those for artists that I'm curious about but don't know where to start (Like Patsy Cline).