The majority of these people know what these parts look like.
Price is what people are more interested than pix.
If you are having problems taking pictures of what you are selling, just use your words to describe it, and the condition that it's in.

No one isn't going to be interested in a shell for $800,000.00 (exaggeration)
You're just spending time taking pictures until later the possible buyer ask you how much $$$, might lose complete interest because of the price you want for that car shell/part. Thus, you spent the time taking pictures, loading it on your computer, then on the web, and in the end, you have a possibility that no one isn't going to buy it. You're not only wasting your own time, but other people's time waiting for you to answer a simple question that usually takes a few seconds to answer.