Why so many Hegel's for sale?

Hype will originally boost sales, and there's been a lot of hype around Hegel in general for the last couple of years.

it is random

but i would say the h590 is in less demand since the h390 hit... h390 does 99% of what the 590 does for most customers AND the h390 has proper and full MQA implementation on all digital inputs, whereas they have not updated the h590 to the same capability

the 390 (and 190) are the sweet spots in the line

Every single time I narrow my search down to the very best in category the next thing I do is go looking to find it used. Inevitably, and I mean every single time, there are none. I watched for over six months, not a single Herron VTPH2A, not one Tekton Moab used. Not one Raven Avian series amp either. 

This makes total sense in light of free markets. When people buy really good stuff they are so happy it stays. This keeps the good stuff off the market. People find out they bought crap, can't sell it fast enough lest it get old and be worth even less. 

Thus the saying bad money drives out good. Nobody spends their gold and silver coins. They hang onto them. When you see a lot of something in the used market that alone is telling you how good it really is.

Economics is a mind bendingly difficult subject to peer into. It’s defeated all but the very best of analytical minds such as Smith, Malthus, Marshall and Keynes.

Given the psychology of the audiophile mind, audio economics might be beyond even them!

On the other hand it could be said that we audiophiles do tend to be rather a fickle ’flavour of the month’ bunch, chopping and changing as we go in search of something ’better’.

Particularly sensitive to hyperbole and criticism, of which there is no current shortage.

Little wonder it seems to take very little to get some of us riled up.

Perhaps someone should start a more meaningful thread on products which have provided long term service and satisfaction?

Simple, integrated units are just a step a long the path. People decide they want something more and move up to separates. They rarely go down or even sideways. Not that Hegels are bad. They are not bad at all.
Millercarbon the reason there are not Moabs for sale is that nobody in their right mind will by them in the first place. When they do show up it will be for pennies on the dollar. One of the worst designs ever perpetrated on the audio market.