eBay is still the biggest site for selling Porsches. I would rank Pelican in a 2nd or 3rd place. Keep in mind though that I only deal with race cars. That's a pretty limited area.
Do you have any suggesion (other than posting on Pelican) for swapping cars? Are there any sites or services (other than car dealers who absorb a large portion of the vehicle value in trading) where swapping occurs cleanly? Have you ever considered doing something like that in conjunction with your interest in listing vehicles from other scattered sources?
I am new to the forum here, and wanted to complement you on the "race car market" blog you've been doing. I am often looking around at car sites, and really appreciate your interesting comments.