I own a lot of records that came from tag sales and the dump. I suspect most of them were played on equipment similar to the OPs, but, even wihtout serious cleaning, most sound okay, and many are excellent. I suspect that using a smaller stylus gets to the part of the groove that was never touched by the large conicals used in such equipment, but it is also quit possible the records simply weren't played all that much - not everyone is as obsessive about music as we are.
That said, I will note that the many used copies of Jefferson Airplane's Surrealistic Pillow that I have had have all been terrible - tar and bong water in the grooves and played constantly. And that is before we get to the fake stereo remix and Dynaflex. So I bought the Sundazed mono reissue for what seems like lots of money back in those innocent days, and it was a huge improvement. That is, until my daughter carried it off to her lair... I was too proud of her taste to complain about it.
That said, I will note that the many used copies of Jefferson Airplane's Surrealistic Pillow that I have had have all been terrible - tar and bong water in the grooves and played constantly. And that is before we get to the fake stereo remix and Dynaflex. So I bought the Sundazed mono reissue for what seems like lots of money back in those innocent days, and it was a huge improvement. That is, until my daughter carried it off to her lair... I was too proud of her taste to complain about it.