I collect all Kiwi artists on vinyl & try to get them signed. Have started 70's - 2000's. I owned 8,000 vinyl & lathe cuts, with 1500 one or more signatures on covers. Have a number signed by label owners, though not many by cover artists. Have sold to the Alexander Turnbull Library. Here's link to artical.
natlib.govt.nz/blog/posts/vinyl-survival-a-collectors-legacy