Why is the market for used Levinson amps so slow?

Sorry,
I was not attempting to start one of those endless debates between Levinson vs Krell or any other amplifier. I could easily live and have lived with both amps in past systems. I believe both amps to be sonically equal with many other high end amps on the market today. I've heard the new Levinson stuff and the new Krell EVO and if I was made of money I'd probably have a system amplified by both. All I was trying to say is, one can readily hear the difference in the voicing choices made by each amplifier's designer. The amps share many similarities and specifications, but they do sound different in the way they present the music. If one used the exact same setup that you had listened too for a while and just substituted the amp of the approximate same power and made sure the volume was the same using a meter, you could hear the difference between two given amps be they Krell, Levinson, Bryston, ARC or Sim.
And just to be sure no one thanks I'm endorsing the above brands of amps over other unnamed ones, I just didn't feel like listing every brand of amp manufactured. One's final choice for the amp in their system might depend on personal taste, finances, system integration, reliability, and availability in your area among other factors.
Sorry if my above comments were misunderstood by any and all.

err, because they sound so poor?

err, because they sound so poor?

So far I've typed in and not posted five responses.

Go away.

Nicely put Irvrobinson. Both amps can sound amazing.

I think, there are various reasons and it has to do with marketing in general.
There are lots of brands out there which are great but are not so successful in
sales like others who are better to keep the fire "burning". Harmon
Kardon made huge investments in advertisements and these ads were
responsible for good reviews, listings in reviewers Systems and so on.
In all the postings above there is truth in it excepts sound quality. No one from
those potential product buyers is interested in that. The buyer wants something
which is up to date (whatever this means), he wants something which has good
reviews, something serious, something heavy, something which can be sold
later easily....a typical turnaround product. And when the fuel for the motor
(advertising, reduction of quality, complicated service) is no longer premium,
well..we know what will happen...
The discussions of sound 'quality' comes later, to support a product...(we all
know, you find a positive review for everything...) to give merits, to make it
interesting to the next row of guys who have money and don't know where to
go ...
Audiogon helped to reduce sales because they no longer allow to communicate
with the seller, that feature is gone. This drops any sale to the ground because
a potential buyer always has questions about this and that and ebay isn't the
solution, too. Some simply don't want to sell there.