Why is the market for used Levinson amps so slow?

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.

I would never buy due to the known cap problems and expense to repair.

Rhijazz, I believe that was covered by Charles1dad in the first reply.

I suspect the market for used Levinson amps is slow because the general movement in the audiophile realm is towards high efficiency / low power setups.

Err, and the sound of levinson.

05-17-12: Rhljazz
I would never buy due to the known cap problems and expense to repair.

I talked to Harman about the so-called cap problem a while back. There were apparently some weak parts, not an endemic problem, and it wasn't even in the 334-336 series. The whole re-capping thing is audiophile paranoia nonsense. Just think about it... capacitors are commodities, they're not made special just for Harman. If Levinson amps need new capacitors so often, why don't all other class A/AB amps?