If you look after acetates, they don't wear out, I've got some made in 74/75 which are as good as new after 100's of plays.
You can't cue them in though, they dig up immediately.
The thing is, with Frank Wilson available on at least 3 different bootlegs, 2 Tamla Motown issues and probably more, what could anyone gain by owning an acetate of it, now if it were an acetate of the SOUL 45 then maybe yes, that would be worth something, but an acetate of a 1979 reissue? I've had lots of acetates from the 60's which came out a few weeks later as 45's, mainly from the Pye stable, Chubby Checker, Newbeats that sort of thing, I rate them as being less valuable as the demos.