I see someone is selling a brand new copy of Sarah Graves CD, Black Boxes on Ebay, for the astonishing price of £95.00, plus. Perhaps they mean £9.50, which would be more like it. I bought my own copy direct from Sarah's partner Mick Graves, many years ago for around a tenner, I seem to remember.
http://www.ebay.co.uk/itm/Black-Boxes-Tunes-and-Songs-Featuring-the-English-Concertina-/310896103668?pt=UK_CDsDVDs_CDs_CDs_GL&hash=item4862da10f4
Chris