Bootleg CDs are collections of music, usually of live or unreleased tracks, that find their way into the collectors market without the direct approval of the artist or the artist's record label. Although manufacture and distribution of these CDs is prohibited or discouraged in most countries, certain private record labels still find the channels to sell this material to dealers and fans, who often pay the premium prices that are associated with them. The sound quality is often but not strictly inferior to offically released albums, but they are still very collectible, if only for their novelty.