Info on Mivoc Speakers

Hi, was trolling CL and came upon a set of Factory manufactured Mivoc speakers. Did a web search and found very little info except their speakers and accessories are popular among DIY folks. Contacted the owner who said they were from Germany and 90db sensitive and is a lower wattage speaker. So, I'm asking if you can provide additional info. I,m thinking about an inexpensive el84 set up I n a smaller room and these speakers caught my eye. The owner said it was for an upgrade project that he,d never had gotten to. He is asking $140. Thanks much, Dave