If you are looking for aftermarket car accessories, Yo Car sells interior and exterior accessories and performance parts to pimp your ride. When I first saw the site, I got excited about the installation videos. That is one of things we often use the internet for; looking up how to instructions and diagrams. Must haves for the do it yourself crowd.
The site is still growing so they don't actually have any videos up yet but that will be a very helpful feature for their customers when it's up and running. Ohhhh, they also have a blog with entries containing nice pictures and more detailed descriptions.