Warning, necropost.... I think the OP has the right history for the Linea. That is what I also found we doing research. I have the current Linea and it is world class in terms of performance. I have received good support from my dealer and from Viva in Italy. I also have the Egoista headphone amp and it is also just mind blowingly good.
I don't know about the issue of not providing support for used products, but there are plenty of highly qualified techs around that could fix any issues should a need arise.