If it were a silk indio it might well not have been a typo... I have never seen one go that high, but I suppose it's possible...
They retailed for normal top of the line Didymos prices (definitely over 100USD). But they are selling for 3 to 4 (or if the OP is right about the price more like 8) times as much because they are no longer made, there was only one run of them. With the silk, and the uniqueness plus how they are to wear... they are definitely in high high demand no doubt.
Follow Mothering