I haven't tried selling elsewhere but I've heard of people doing it. The last time I tried selling Cavs tickets somewhere else was when you could still get them as paper tickets from Ticketmaster.

Since transfers on FlashSeats are free, you could sell them somewhere else and just do the exchange on FlashSeats. I'd imagine you're right in the Cavs taking issue with doing that. Teams are running their own secondary markets to capture the extra revenue that was going to places like StubHub. I will say that having an official secondary market is nice, I just think the FlashSeats experience is lacking.

Glad to see another Northeast Ohioan on here!