I'm slightly different case in this case.
Because all those separately sold book, artbooks etc. are not available in Czech Republic so I must buy them from UK or US and it's quite expensive at all. I'm really pleased then if some CE has quality artbook/book (Bioshock 2 CE, Witcher 2 CE, Diablo 3 CE) or figurine etc. As far as I buy only my most favourite universes CE's and stuff (too much of them
) I'm ready to pay for whole package.
But I understand other collector's buying principles.