I'm probably going to get slated for this but ah well. Amazon currently have Moby's brand new Album Wait For Me, which came out on Monday, for only £3.99. There are 16 tracks on the album making it around 25p a song. The album is getting really good reviews and sees Moby back on form. I paid £8.99 for this a couple of days ago on CD...DOH!!
This is by far the cheapest I have seen the album for.