Most expensive yarn ever?

*Thunk*

Perusing a yarn website, I found a yarn called Karabella cashmere elite. It's a small ball - worsted weight 82 yards per 25g- and retails for £155.71 - that's 250 US Dollars. I'm in shock. Not even qiviut is that much. Having checked, the musk ox fibre sells for £56.05 - £56.05 per 218 yard, 28g skein. That's a lot more yarn, albeit laceweight, for a lot less money. And they say qiviut is the supreme luxury yarn.