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
Vince Galbo fixed and upgraded my SA-100 mk2 a few years ago and I upgraded my power lines to my system as well. Both worth the investments. 

With my SA-100 mk2, I now enjoy Class AB more than Class A, which seems less 3D and less musical than Class AB operation. I don’t know why this is, and Vince never heard of this issue. I tried an Aragon 8008BB in my system and it really highlighted Vince’s upgrades. 
The Galbo Mods are worth every penny,having my SA100 mark 3 done  has given air to the higher frequencies and the bass when in A bias. The separation of instruments in upper frequencies was vastly improved with the Galbo mod. I'm still breaking it in...
Wow, an almost 20 year old thread resurrected from the dead. I used to own the SA-100 Mk3 and did find the treble to be a little shut-in and lacking in air, and the midrange lacking in separation and the overall sound too warm and thick, contributed by the fat bass. Good to hear the upgrades managed to eliminate all these shortcomings.