timo888 wrote:P.S. I don't have any real stats to back this up, but one of things Silvia owners seem to do very often with their machines is
sell them.

Based on my personal experience over the last 5 years with my Silvia I'd say the answer is twofold with a kicker:
1) It's really the first "serious" machine a lot of us purchase after the steam toys or Gaggia Espresso, et al. It's a great learning tool and usually fans the flames of wanting to learn more and explore other machines and rather than have two machines the Silvia is sold.
2) It's sellable. It's a nice enough machine that it can be sold unlike machines at initially lower prices and has the components to run for years.
3) Kicker: there have to be some folks that just don't like the machine. Again, it's usually the first (relatively) expensive espresso machine that a lot of new espresso converts purchase and some probably don't find the process very rewarding (or too fussy). [Or they read these darn forums and upgrade-itis sets in quickly!

]
I can guarantee three things about every product out there...someone loves it, someone hates it, and there are a bunch in the middle.