Yeah, I interned at a second hand (can't remember if charify or not but probably) store for 4 weeks or so when I was in primary school (internships are part of the curriculum), and fucking hell.

People really like dumping a shit ton of clothes and random stuff. I recall testing like 10 pairs of in-ear headphones some of which were pretty disgusting and covered in makeup and often earwax. For some reason, they were apparently sellable. Some pairs looked brand new, but most didn't. Somehow they even sold quite a few.

And no, I didn't stick the headphones in my ears, fuck no.