I bought mine off ebay for around $550 plus $200 shipping. When it arrived, I discovered one of the supports was broken in two. A generous list member provided a replacement part from a junked top and I am good to go.
Here is my 2004 top on my 2002 Boxster right after installing it in Spring 2011 (before new wheels and aftermarket rear spoiler). It is the best mod ever!
I found it on Ebay for $900 from a guy modifying his car for track use.