I bet he sells them!
Think of a first-time instrument buyer and seeing those shiny new instruments.
"It's on Craigslist so it's got to be a good deal, right?"
If they don't sell for a profit, they will take them back to GC for a refund within 30 days, right? I know an unscrupulous consumer who did a photography gig with new Canon DSLR from Costco, photographed the gig for a week, then returned the gear for a full refund the following week. I pointed out that it was taking unfair advantage and their response was simply, "They took it back..."