I love Pure (I have a Gray MOP bracelet) and agree that cost is probably the reason, as well as the fact that VCA doesn’t offer enough variations in the line. They’ve stopped producing Gray MOP I think, so you’ll only see diamond, MOP and Onyx as options, and that’s if you ask to see the pieces!
They’ve almost made the line limited by not displaying them. Over the last 5 years I’ve rarely seen them on display in the U.S. Other countries seem to carry or display a wider variety of lines. Just my observations!