Thanks Ralphcor for the ebay tip. I've been wanting something like that for my cats, but always thought that $200 was too much. My mom got one for Yoda (someone gave it to her for free)--it looks like a 4 foot tall tree. Yoda loves it. The windows are high, so she lays on her tree to watch the birds outside. I love the great big ones and think it would be fun for my cats. They always want to be as high off the ground as they can get anyways. What is sisal rope? I've heard of it, but didn't know why cats like it so much.