Sure some fans who did not renew can score some seats below face during some of the lesser January mid week games, but good luck during the playoffs. Such fans won't be able to sniff such seats without paying well above face. Let's face it, the playoffs are one of the best parts of owning season tickets.
I've owned full season tickets since before the LeBron lottery and used the opportunity when LeBron left not to ditch the tickets but to get better and better seats. Those that stayed should by now have excellent seats in a given price category that carry value on flash seats. But I did not endure all those years as a season ticketholder to sell seats; I got them because I'm a crazy fan.