A recently released 17 cd box set, “The Island Years”, collecting most of the recorded works of singer, songwriter and guitarist John Martyn (who died in 2009) is being offered at download stores from just £1.29 – which is just over 7.5p per CD and less than 0.5p per track.

The offers, which have been available for several days, are on reputable download stores including Google Play, Amazon MP3 and Rakuten Play.com.

The physical box is around £150 which suggests that the bargain offers are some kind of mistake, but one that is replicated around the web on different music stores. Did someone at Universal Music mis-tap a number? Or is it a sign of some kind of automatic pricing algorithm, where one store sets a wrong price, and the others replicate it so as not to be outdone?

Or maybe someone is a John Martyn fan and wants the widest possible audience for what is a remarkable body of work? No, scrap that idea.