Ebay For Jewelry - Why?

Ebay can be awesome, for all kinds of vintage (and new) stuff, right Sher?
But I really do wonder who is buying jewelry on Ebay.

This vintage Hermes gold choker/tiara sold for $2950 on Beladora.com
The same exact piece is up for sale on Ebay for $17,500

So yeah...who is buying jewelry on Ebay and why?