When I was into buying and selling 914 parts to fund my habit, I mean hobby I did pretty well. For the most part it took care of most of the major expenses. The interesting part is I had setup an RSS feed that would automatically deliver 914 stuff for sale on craigslist on the desktop of my computer and phone. It kept me connected to a lot of good deals within seconds of them being posted.
The last two years with the economy tanking and dispendable income at a all time low, it has been a different story; the craigslist market has been flooded daily with listings of 914 cars and parts. The sad thing is (at least for a seller) is guys are selling thier cars at prices that make me shudder.
I still like to look at my RSS feed now and again, but not with the same "looking for a great deal" enthusiasm..."there's way too many of them now." I'm sure once the economy turns around, we're going to see a spike in our car values as well as parts. Ebay on the other hand has become another story...just try to search for brake calipers (any make or model) and see what you find.
Like it has been said...vendors.