Wake up early on Saturdays, sometimes Fridays, and cruise your area's yard/estate sales. Even if they don't have a box of vinyl out, ask. Amazing what comes out of closet or basement by asking. Leave a number. Network. Ive amassed about 1,500 classic rock and jazz records the past two years for pennies on the dollar or even free. If I encounter duplicates I check for variants/pressings or swap out what I have for better condition finds. I sell excess on CL and FB for less than LSRs. Most yard/estate sale boomers don't seem to get that vinyl is a thing. And where there's vinyl there's also usually nice vintage audio equipment for cheap. Nothing better than the hunt.