Those are all either event or contribution items, which were available for only a limited time.
You can still buy all of the items I have equipped relatively easily in the exchange though.
(With perhaps the exception of the chicky on my head, which has gotten pricey).
Here's the Menewshan price guide, which has all the rare items listed, along with their prices.
http://www.menewsha.com/forum/gaming...rt-please.html
mortosdersoulstealer