Seller is including eBay fees in handling fee

[rosie_palm2]

I recently noticed an item (specifically, 2 sample vials of perfume) that I might be interested in bidding on. However, the postage was listed at $8.80, which seemed excessive to me for such tiny and non-fragile items, so I emailed the seller asking if the vials would fit in a small padded envelope for cheaper postage (as I know that these only cost a couple of dollars). The seller replied saying that they could post them in a small envelope, but the postage could only be reduced to $5 "as would still have to pay eBay fees etc."

It seems very unethical to me for a seller to expect that the buyer cover the cost of listing and selling the item, over and above the winning bid. I have sold on eBay myself and the way I see it, that is a cost that the seller needs to absorb in the final cost of the item, not something to tack onto P&H. I can't find anything in eBay policy that takes an explicit stance on this. Could anybody enlighten me on eBay's rules about this?