Whoa, 99 "essential" classical music songs on mp3 for only $7.99 at Amazon. "Album Savings: $80.12 compared to buying all songs." (thx, martin)
Update: Here's another good deal: all 9 of Beethoven's symphonies for $7.99. (thx, egghat)
Update: And another: 48 classical guitar mp3s for $0.99. (thx, mona)
Update: And still more good deals: 99 songs by Mozart for $8, 99 relaxing songs for $8, and 99 Beethoven pieces for $8.
Update: Five Hours of Classical Favorites for $4.
Update: Five Hours of Classical Adagios for $8 and 50 Essential Classical Film Moments for $8. If you bought everything in this post, you'd have more than two days of music for less than $60.