This might be useful to someone here?
https://www.audiogon.com/listings/other-reel-to-reel-collection-40-ea-7-5-ips-two-track-original-1950-s-1960-s-2017-11-23-music
https://www.audiogon.com/listings/other-reel-to-reel-collection-40-ea-7-5-ips-two-track-original-1950-s-1960-s-2017-11-23-music