Here in Austin Texas they have a record convention (the largest in north america) every year sometimes twice a year,they have tables of Vinyl, cassettes, 8-tracks, 45's, CD's anything physical, hopefully these will continue after the Covid epedemic subsides or we have a vaccine. anyway, I would look for a record gathering of some type in your area or come to Austin. These events attract the type of buyers your looking for.
Matt M
Matt M