From a Selection

I was cutting up an old copy of Harpers today when I noticed a stunning black Dior dress which was unpriced, reading simply 'from a selection'. I then noticed a Topshop blazer and McQueen heels with the same tag. Forgive my ignorance, but how is it that such gems of fashion are being given bylines more suited to a box of chocolates? If it was a piece of jewellery or a scarf, say, then I could understand that maybe one would have to buy all of 'the selection' together instead of just one piece-but a Dior ballgown? You don't go around buying half a dozen of them at once. Explanations, anyone?