I purchased my 2005 987 on eBay Motors from a private seller in California, I live in New York (this was during this past summer). I paid Carchex (~$200) to go take a look at it and test drive it for me as I wasn't going to fly all the way out there to do it myself. While the Carchex visit ensured that the car was in fact real and present where it was supposed to be it, had an engine, and ran was definitely not as thorough as Prosche's own Pre-Purchase-Inspection (PPI).
After receiving the car I took it in for a PPI at my local Porsche dealer. They found the following small but somewhat costly problems:
* Sport Chrono "clip" broken - $550
* One of the three Homelink buttons broken - $100
* Cigarette lighter broken - $50
* Ash tray lid broken - $200 (I found this one)
* Air vent lever broken - $300 (I found this one too)
* Cup holder door broken - $300 (I knew about this one before I bought it but thought it would be "cheap" to fix)
* ....and one or two other small things that I can't recall right now.
As you can see they are minor things but it adds up quickly since Porsche just replaces entire items like the Sport Chrono unit if there is even a small problem with it like a "broken clip." Thankfully there was nothing *major* wrong. I did, however, just have the clutch replaced and a leaking RMS replaced (under warranty) for a total of about $1900 (that was with a 40k maintenance as well). I also need new tires which will be about another $1,000. I guess the moral of the story is try to get a Prosche mechanic/dealer to look over the car before you buy it, not a generalist, and also to be prepared for the costs associated with owning a Porsche.
The other piece of advice I can give you is around shipping the car (if you're going to do that). Shipping is another whole area that you need to research and it's sort of a sketchy business IMHO. I spend a lot of time researching shippers and shipping costs (www.transportreviews.com is a good site for this). I finally settled on Direct Auto Movers (a broker and a carrier - yes there's a difference) based on price, reviews, and just a good feeling for the guy I was dealing with (Brian if you opt to go this route). Shipping across country from Northern California to Upstate New York was $1,100. If you do have the car shipped in an open air transport make sure to request that it is *top loaded.* Top-loading ensures fluids from other cars on the transport won't drip onto your soft top. Top-loading will cost a little more, but, it's worth it.
Also, don't forget to vet the seller themselves. In addition to the standard eBay vetting (good rating, good feedback, etc. - does Autotrader have something similar?) you can do simple things like Google him/her. I Googled my seller, his business, found his home on Google Maps, etc. to make sure everything "added up" that he'd been telling me.
Overall I've very pleased with my sight-unseen, cross-country, Porsche purchase. With a little due diligence a long distance purchase can work. Here's a similar post requesting general advice for buying a Boxster.
Hope this helps,
Jason
I too am overall pleased with my sight unseen boxster purchase, but mine was not without problems as well... I purchased mine from a porsche dealer out of state as a CPO vehicle. So obviously they did the PPI, but did not find a lot of cosmetic issues that I would have thought would have been mentioned on the PPI or the CPO checklist. ended up having to re-paint the bumper covers front and rear at a cost of just over $1000, and the dealer ended up making up a portion of it to me... Shipping was another story for me as well, I went with the company recommended by the dealer, and while all ended well, the whole transport seemed very unorganized... the driver may leave on this day, but he is going to stop here on the way for someones wedding, and then he may have to pick up a vehicle here or there along the way... so he could make it to you on this day, but maybe not until this day, etc.... but I think that is just how thier biz works, they try to pick up as many cars as they can along the way to increase the profit of that trip, and that may mean delay in when you recieve your car.... Anyway, I ended up happy in the end and hope you do as well! best of luck!