Try other sources for your Vionics besides QVC. 6pm.com has them at a reduced price. Not sure about the selection.
I don't find them to be particularly expensive because they do have the orthotic in them, I just don't find them to be particularly attractive for the most part and they do not work for my feet at all. I bought a pair of thong sandals and after a few hours of wearing had the worst pain going up the side of both of my legs.