[Porsche-O-Phile]

Eventually they'll go up again. They're probably at or near the bottom of their depreciation curve right now where every wanna-be zit-faced high-school kid can afford one and inevitably either ends up wrapping them around trees, blowing the engine and subsequently parting out the car (after realizing how expensive they are to stay on top of), or let them go to hell (after realizing how expensive they are to stay on top of). As such, simple supply/demand economics will do its magic and you'll see an uptick, more noticeable once demand increases in addition to the supply decrease.

The appeal of cars from this era is becoming clearer as people seem to get progressively more and more sick of ever-increasingly draconian emissions laws and an overabundence of expensive-to-fix, delicate electronic crap on "modern" cars. I personally LOVE the fact that these cars do NOT have OBD-II as well, which ultimately means one less potential way to fail a smog check.

It will happen, but I don't see it happening yet except for very pristine or exotic examples (like cherry 968s or S2 Cabs, or maybe perfect and unmolested 951s/951S-es).