Because they are not parcels. Simple. And this me is not my PS me.

And if you care to look at my pre-list ID they are all 'free' post, even parcels. because I don't have a lot listed and am unlikely to get multiple purchases.

On my selling ID, however, only letter rate items are quoted with 'free' post. I you don't believe me simply look at the posts on this subject on the PS board. You are a PS, so it shouldn't be that hard.