I'd ring up and ask to speak to supervisor to report the seller for spamming the category.

Whilst the frangrance and size variations might differentiate the goods, eBay still have a policy regarding such spamming of product.

"Avoid excessive listings of the same item because it makes finding items harder. Excessive listings are any set of identical items which breach the Duplicate listings policy or which eBay determines harms the search experience, regardless of the listing format used"