Martin and Dick (GSS) disagree on the cassette business.
Looking at the Folktrax archive, this is the entry:

BALD HEADED END OF THE BROOM, THE - "O love it is a funny thing - it affects both young and old" - ROUD#2129 - MERCHANT: Gargling Songster, Chicago, c1885 titled "Lines of Love" - RANDOLPH 1946 - KENNEDY FSBI 1975 p449 Martha Gillen 1954 -- Martha GILLEN, rec by Seamus Ennis, Co Antrim, 1954: RPL 21839/ FTX-019 & FTX-434 - Dick & Sue Miles Radio Folk on Two 1984 CASS 0453 --- Beach Mt NC: FOLK LEGACY FSA-23

If you look at this on the website, FTX19 and FTX434 are hyperlinked to Folktrax cassettes that Kennedy sold. Neither of them contains Dick's recording - they contain the Martha Gillen recording. CASS 0453 is not hyper-linked, suggesting to me that it was - as Martin states - a private recording that he made from the radio and kept as such in his archive. We've all done it. This all suggests that it was not sold. Now, of course, the recording might have been put on a Folktrax commercial cassette at some stage between 1984 and a while prior to Kennedy's death. I don't know. But that's not what the website suggests.

I'm no apologist for Kennedy. I knew him, we fell out, talked to each other again and fell out again. He did some dubious things with recordings, but perhaps not on this occasion.

Derek