I considered that they're now $200 NIB on Amazon, and that the dude I bought them from attends UPenn, so the chances are pretty good that unless he's financing his ivy league degree by selling stolen goods, it's more likely that he bought them, tried them on, decided he didn't like them, and listed them on CL to cut his losses.

We have really nice furniture in our house that we bought from a family on the main line. They still had the tags on them - if I were to guess, the family moved here from India, landed a job making more money than they needed, and overspent. Bought this couch and loveseat, decided they didn't like it, and moved them into the basement, buying another. Not sure how long they sat down there before we picked them up, but they sure look nice in our living room.

Even when back in college, I went to yard sales in (central PA) affluent neighborhoods. Sometimes people just want to get rid of otherwise good stuff. Now that I do alright, when I need get rid of a DVD player or a stereo I don't use anymore, I list it for free.