www.sideshowweta.com
www.tolkientown.com
Specialty retailers
Now I don't personally own any of these sculptures, but I have seen the entire collection and they are quite beautiful. They are all movie based (the Weta part is for Weta, the special effects company for the film), and they are just very cool. My personal favorites have to be the Bilbo/Gandalf BagEnd Bookends, and the Sam and Bill the Pony sculpture.
They are in very limited editions so if you find one you like, you must pick it up quickly