On Monday (tomorrow) Footage Firm will be having a Cyber Monday special where you can get 40% off yoru purchase. This website has Royalty Free Music for $8 a CD. With this special you're looking at a FULL CD of music for around $5. I use them for primarily music, but they also have video, sound effects and more.
To save 40% you need to use the coupon CYBERMONDAY11