Yep, screw it, I will just take honest pictures and sell it as shown. I am completely buried in stuff to do. Plus people call me every 15 minutes about something or other, very distracting.
I now have a very efficient way of listing stuff for sale. My employee cleans stuff, assigns inventory numbers, and photographs. Then he connects the camera and runs a Linux bash shell function that saves pictures from camera, resizes them, and saves them in folders by inventory numbers.
They are uploaded to my webserver in batches.
Then I get a cart with stuff to my office, where I write descriptions and do pricing. I can list stuff at the rate of two minutes per item.
When phone calls come in the middle of my listing, it is kind of distracting.
Clean it up really good, get off the loose rust, grind down to good metal and put a coat of penetrating rust-stop on the rest. DO NOT use a zinc cold galvanize, it'll mess up the lungs of the next guy to weld on it.
This is not to try and hide the damage, it's to make an honest showing of "We've cleaned it up and stopped the rust, and these are the areas that need to be replaced." Then the buyer doesn't get the feeling of a pig in a poke.
You can prime or paint the rest of it, but I'd leave the bad parts in rust-stop or Weld-Through Primer only. Someone will be welding on it.