Obviously the Janis Joplin thread got me thinking...
On a quick search I found this:
!!!64 Porsche 356 Coupe | 1964 Porsche 356 Model Classic Car in Moundridge KS | 4081928841 | Used Cars on Oodle Marketplace
On the other hand on that same page there were 356's in the $100K range, also obviously just like the 911 there are a lot of different makes/models/years and some are much more collectable than others.