qcsmmpe

How difficult can it be to set up your own E-store selling Porsche parts?
On internet you can find almost an unlimited number of these sites.
Here are two examples:

http://www.patrickmotorsports.com
http://www.drivewire.com

And here is a Swedish one:

http://www.autodelar.net/katalog.htm

But my question is from where do they get the parts they sell?
How do they get in contact with a supplier that can offer these Porsche parts?

Some more examples:

http://www.vertexauto.com/
http://www.porscheshop.co.uk/
http://www.autopartswarehouse.com/porsche~rep.html
http://www.porschepartsonline.co.uk/
http://www.dartauto.com/
http://www.europartsdirect.com/
http://www.pcars.com/

VinnyC

It's not very difficult to do, but there is a lot of "Good" competition out there that have been dealing in Porsche parts for some time - i.e Pelican, Stoddard, Automotion, etc.. These companies are estblished and have good reputations and presence with the Porsche community. And as you said, there seems to be an unlimited number of sites now doing this same thing...

If you want to do this, Search for Foreign auto parts Distributors or Wholesalers - They most likely won't be specific to one make such as Porsche, but can get Porsche parts for you to re-sell at retail. Some might even drop-shop for you.
Once you have a business extablished and have a Federal and State Tax-ID number you can open an account with them and begin to integrate their catalog and database into your website store.

Starting a Webstore is very easy. Almost every hosting company has one available and there is plenty of open source products available too.
Good Luck!