What is the average price of a music CD?

depends how famous the band is, and whether it's a single or an album.

usually a single mp3 download is about 70p, and a single CD is about £2 or £3

an album is usually about £8

For those of you in the US using February 2010 conversion rates:

mp3 $1.09, single CD $4.57, and album $12.19. This may be old pricing as I have bought a UK CD album in 2010 at 9.99 GBP. Round off 9.99 GBP and 10 GBP is $15.70.