Second Hand Birkin Bags at Twice Retail Price

Since it's Heritage Auctions (3rd largest auction house in the world) you can be sure they're authentic, but wow...some of these bags are twice current retail price. And these bags are 2nd hand!  Just goes to show you that a Birkin bag is a good investment!
The bag shown, a Hermes 35cm Blue Izmir Clemence Leather Birkin Bag with Gold Hardware 
is priced at $21,500 - whereas if you bought this today at an Hermes store it would be about $10K (give or take $1,000 do to tax variations)

http://jewelry.ha.com/c/search-results.zx?N=776+791+2268&No=0