IMO... it's simply popularity. Value. Sales, of course, but primarily it's a good value piece. Adequate power, tube sound, all in one box simplicity.
There's lots of BW speakers available... McIntosh gear too... always up for grabs online. That doesn't make it bad. harder to sell maybe, but not bad.
The only other thing I've noticed without regard to Cary Audio, is when a newer itteration is due out, folks so inclined to move into newer, sell older. So that's something to consider wehn a whole bunch of one thing shows up for sale too.
There's lots of BW speakers available... McIntosh gear too... always up for grabs online. That doesn't make it bad. harder to sell maybe, but not bad.
The only other thing I've noticed without regard to Cary Audio, is when a newer itteration is due out, folks so inclined to move into newer, sell older. So that's something to consider wehn a whole bunch of one thing shows up for sale too.