I did some checking on Beatles websites and there is a more complete history on inmyownwriteblog.com The recording got passed around with each band member getting to keep it for five days until it ended up with pianist John Duff Lowe. He kept it, left the group shortly after for another group, later working in the financial services industry. He largely forgot about the recording it, keeping it in the bottom drawer of a dresser and didn’t see his old band mates after 1960
In 1981 Lowe finally realized it might be worth something and had Sotheby's auction house do an evaluation for a rock and Roll memorabilia auction. Paul read about it in a newspaper and had his lawyers write an amicable letter asking him not to sell it. When Paul telephoned, Lowe got the impression Paul was fishing hoping to get it for nothing. Lowe insisted on being paid and eventually they agreed on a number. Both have kept the number secret but 12,000 pounds is the guess-timate.