Call ebay and have them look at the listing, point out that you specifically described spine damage, buyer is a reseller and further damaged the books and request that they close the case and remove the negative feedback. You can also tell them that she caused further damage to the books.
Give them the URL to the policy that tells that a seller can win a dispute when the buyer's complaint is for issues that are described in the listing.
Feedback reply: Books as described. Competing seller caused further damage in attempt to get further refund.
Thanks! I'm calling them now. I really wish the photo was still there so they could view it.