Why so many Plinius for sale lately


I was curious why there seem to be a lot of the latest versions of Plinius amps for sale lately, like the 100MkIII and the 250MkIV. The asking prices seem to be pretty low, yet they haven't been marked as sold. All the reviews I've read rate them pretty highly.
audiojerry
Probably the one important weakness of Plinius amps is its high frequency extension which is relatively rolled off/muted, so you do not really hear the crispy sparkly sound of live instruments.
The first SA 100 did have problems with hum which was addressed I believe in the Mark III. The Mark three had two separate toridial transformers one for each channel.
PLINIUS uses silnote wiring in their products which is a silver wire and they recommend that use use this product. I use a cryo treated silver inter connect but it's the Darwin Cables The Truth with excellent results.
I know of no amp that is just plug and play and you get the best results. If you want the best out of a piece of gear you have to be willing to accommodate it,experiment with it and tweak it.