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
the old plinius design by steven like sa 100 mk and sa102 sound much
better than sa 103 and reference and the difference in price is big for the new ones with very tiny improvement for that cash if you see cosmetics
wise they almost identical except the new ones comes with the blue back plate this remind me of the original pass labs aleph yes the cubes ones in which i still have sonic wise is far much better of the generation that came after the cube is superior from top to bottom and the mid are
glorious envy of the best of tubes amp the same story goes with plinius
the older ones is better than the new ones let gets the fact straight i had the sa 102 and sa103  the mid on 102 its much more fluid on 103 was more sterile and did not have the texture of the102 the 103 had 1 hair more in the extension high and low in which  is not a improvement 102
have better dynamic,pace.and tonal emulation on the voice and instrument are more natural on the 102 that why you see a lot of sa 103
on sale . reference equipment pre cj premier ls17,cello encore,phono preamp einstein. cd 47 labs.jenas labs cable and conditioner amp aleph 5 upgrade plinius sa102 otl tubes amp.turntable linn lp 12 full blown
cartridge ortofon rondo red,kiseki lapiz azuli , miyabi cartridge actual on the linn speaker sonus faber amator electa 1st ver. magnepan1.8  devore gibón and the old faithful quad els 63 with sequerra tweeter 

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 Ulta Upgrade from Vince Galbo, former Plinius importer and current warranty tech, does much to fix this fault. My SA-103 sounded a little plummy in the midbass and, as Pani says, rolled in the highs. After the $1,500 upgrade, which replaces all caps and resistors and beefs up the power supply, among other things, it became far more balanced through the frequencies and extended at both ends, with more nuance and micro-detail. Quieter, too. Now it is an excellent amp, IMO. While not quite as "sparkly" on top as my VAC 300.1a, it's close, and that says a great deal.

Vince Galbo refreshed my sa250 mkIII last year with new caps and an upgraded to the predriver stage.  It sounds much better but the transformer buzz is annoying