SOLD!!!!
OK, so I did a search on Ebay to find the absolute cheapest price one had sold for recently. That price was $370 with most selling for $400 - $500 used (or "open box").
So, I figure that it would be fair to list mine at the cheapest price that I found and this way you don't have to bid on one and wait for the auction to end. And you also don't have the roll the dice on a questionable seller on Evil Bay.
In any case, I bought mine from MusiciansFriend.com in late 2008. I still have the box. I have the rack kit, the ear buds, transmitter and receiver, docs, etc. She was not used much at all. Only thing that I may be missing as I recall may be some of the foam and rubber ear surrounds for the buds (you know the ones that you put on to fit for your size ears). I believe you can buy these in packs for cheap ($5 or $10 maybe?). Anyway, I'll match that lowest price ($370) and even split the shipping with you.
EDIT: Bump for lower price - $355 ! Hit me up! These sell for $600 new --->
http://pro-audio.musiciansfriend.com...tem?sku=270237 SOLD!!!! 
Shure PSM200 In Ear Monitor System - Cheap! 
