I think it might be much easier if we take a step back and for you to explain what you are attempting to accomplish.
I get that you want to post photos to a new E-Bay add. What I don't know is how you are taking your pictures and where they reside. My flow when I post to E-Bay.
- Take picture with iPhone
- Email picture to myself
- Open email on iMac
- Save picture on iMac desktop
- repeat steps 1-4 for other pictures
- Then when I'm in the E-Bay add I browse to my desktop and select the photos for my E-Bay add.