Hi Headtunes,
Thanks for bringing this issue to our attention. I reviewed your recent posting attempts that failed due to this error and I was able to find that eBay's system attempted to route the items to different eBay categories based on the ISBN information you provided.
Since you had selected a category that does not support the “Item Condition” field and eBay's system attempted to redirect the listings to a different category that requires the item condition be specified, the listings ended up getting rejected because the item condition was not included.
Unfortunately, the additional error details I was able to get from eBay do not specify which category that attempts to redirect these listings to, but it is apparent that eBay's system felt that they would fit better in another category.
If you would prefer not to select a new category, I believe that you would be able to post these books in the category you have already selected by removing the contents of the “ISBN” field on the lister page. However, in order to list them with the ISBN information intact, it appears you would have to try posting them to a different eBay category.
I realize this is not apparent based on the error details that are displayed in your account and I will look into the possibility of updating our system to include the full details of this particular error.
I hope this helps. If you need any further assistance with this, please feel free to contact our customer support team by mousing over the “Help” tab and selecting the “File Support Case” option.
-Mike