It is a very nice cabled scarf - I like it alot. But $10 for a scarf? That seems way over-priced to me. Some of her sweater patterns are only $5.
As to the download costing more, I would never pay more for a download then a hard copy. That makes no sense to me.
I bet you could get one of the pattern books, in particular one that is dedicated to cables, and find an equally intricate cable pattern and make just as nice a scarf on your own. I recently checked Vogue Knitting Stitchiinary 2/Cables out of my library - it had quite a few cables that would work.