I pick up one last summer off this board that is completely rust free. It had been for sale since 2010 but had a very vague description and crappy pics.
I made sure to inspect it as thoroughly as possible when I went to check it out. Interior was a bit dirty and stale from sitting, but the leather was soft and I made sure to check the lower fender area for rust as well as removing the fuel sending unit. Both areas looked brand new so I knew it was a good platform for a project car for me.
Point of the story is dont give up on finding one. Clean, rust free cars are still out there, and sometimes just a few pages back in the for sale section here.