If you've bought used records, you've probably had this experience. A record store worker pulls the record out of its sleeve, looks up at the ceiling, turns around three times, mumbles some weird incantation, and then, pondering before speaking as if he or she were the swing vote on a Supreme Court decision of great Constitutional significance, says, "Hmmmm...I'll take four dollars off the price."
That might be an exaggeration, on second thought. The parts about looking at the ceiling and arriving at a four-dollar discount, though, happened during at least one of my visits. I'm sure of that. I'm not complaining, as that's a good discount, but it's an interesting method of assessment.