Occasionally a Late 2005 case will hit eBay. A mint one was going for nearly $200 once, I asked the seller to come down and got no response. It eventually sold for around $140 I believe.
Still outrageous, but it's worth it to someone if you want to preserve the looks of the best PPC computer ever made. I know I would be willing to pay a little more for a mint case on my Quad.
I have broken feet on mine, but 4 rivets are still intact. I was able to bend the feet *roughly* back into position.