At the risk of stealing Charity Chic's schtick - try saying that without your teeth in - here is another of the 50p CDs I picked up in my local second-hand record shop the other week.
"Ghetto Style" is a 1990s compilation of early Gil Scott-Heron material which includes pretty much all of his second and third albums, "Pieces Of A Man" (1971) and "Free Will" (1972). I already have "Pieces Of A Man" - a truly exceptional record - but it was well worth the 50p to get "Free Will". Here are a couple of tracks from that.
"Free Will" - Gil Scott-Heron
"Did You Hear What They Said?" - Gil Scott-Heron