I have bought a few used LPs at local shops but I generally find them at sales and thrifts. I look at each for scratches and other such damage. There are so many out there that I just pass on anything that doesn't look good. After cleaning and playing, I put notes with them in new sleeves and poly bags over the covers. On the other hand, there are "flippers" that don't visually grade, they just look at the album and take it for resale, no matter the condition. I picked up a couple of dozen recently that had no damage to covers, sleeves or disks that were properly stored by the previous owner. At that sale, a lady I have seen before that I call a "flipper" was trying to get to the records while I was on the floor searching and kept tapping her foot lightly on my leg - just ignored that. She then went to the sale operator and complained about the old guy "hogging" the records. As long as this market continues with prices from $4 to $400 a piece online, the aggressive nature will continue. I just want records to listen to on my vintage systems like when I was young and foolish now that I'm old and foolish.