Hi Pete, Thank you for your suggestion. Yes, I can upload the photos to the desktop & choose from there so it would appear that iPhoto is the problem. 

It's a very time consuming way when it was so easy before to choose a photo or 4 from my iPhotos & add those photos to a listing. From googling around I can see that I am not the only one with this problem, I hope Apple fix it soon.

I have also experimented with emailing the photos (from iPhoto) to myself & saving them on my iPad & then doing the listing from there. iPhoto is not on the iPad just Photo. I have found that this works on the full eBay site but not on the app. 

Thanks again.  Cheers, Nan.