Most sellers that understand the fee structure add the amount, or at least part of the amount into their sale price. Same with postage. Some buyers get miffed if postage costs any more than what's on the label, so sellers add it into either their buy it now price or their starting amount for auctions. I charge $8 for small parcel rate parcels, which covers the fees on postage.

We sometimes see new sellers in here that follow the ridiculous eBay recommendation and start their auctions at 99c, then have $7.20 for postage. Their item sells for 99c and then they are hit with the FVF's on postage as well, so they are actually losing money by listing. It worries me how many DON'T come into the forums and don't realise they are losing money until they get their eBay bill.