Understood, OldSchool.Ease of trade in. Some people don't want to deal with an independent buyer. People have been robbed through Craigslist. Some aren't aware they can. For many it's not worth the extra time required (I can tell you I get paid more per hour than the extra money I'd make going through a private sale, dealing with meeting up, the bargaining, etc).
There are a lot of reasons people choose not to bother.
I have never resold anything on eBay, or CraigList, or anywhere else.
But because of Apple's predatory pricing of the new MacMini I was considering to take look to Swappa.
It appears a more secure exchange venue.
But do not know. Opinion?