Rare groove is defined as very hard to source or relatively obscure soul or jazz music. It is primarily associated with funk, jazz and pop, but is also connected to sub-genres including jazz fusion, Latin jazz, soul, R&B, northern soul, and disco. Rare groove records have been sought after by not only collectors and lovers of this type of music, but also by hip hop artists and producers. Collecting rare vinyl records is an important aspect of the rare groove scene, music that had failed to gained acceptance in a previous time was given a "new lease of life" by DJ's on pirate radio stations. Pirate radio stations and DJ's participated in a "recovery, repackaging and retrieval" of this obscure music.
extracts taken from http://en.wikipedia.org/wiki/Rare_groove
