I think I could maybe shed some light on the negativity, or at least give you another perspective.
Sculptor Kim Graham adopted the design of these stilts from the theatrical digitigrade stilts that were developed by (Patrick)
Tatopoulos Studios for their production design work on the Underworld and Underworld Evolution films (as
stated at her personal website, where she still sells these for far less than the Weta price). Kim opted to build her stilts with steel feet as opposed to the lighter carbon fiber feet Tatopoulos used. Look in the special features sections of both films to see how the design was first implemented and later refined for the second movie.
Admittedly, further developing these stilts to be used by most anyone is no small feat..(pause for laughter) But having
built a set of these myself for my
Arbiter costume I wore at Dragoncon 2008, I know firsthand that it can be done and it's actually not expensive at all. Anyone with time to spare and moderate engineering and metalworking ability could do this based on the documentation of the construction provided on the DVD's. Total material cost for me was around $100.
I think that the stilts that Weta and Kim Graham are offering are beautifully crafted, and certainly a convenient solution for anyone that would not be able to weld and fabricate or go through the trial and error necessary to balance the design. For those without the budget and more of a Do-It-Yourself attitude.. the cost may seem a tad unjustified.
I think they're great, and I applaud the concept of making them commercially available to the public as a great step in the right direction.. and furries everywhere just breathed a collective sigh of relief (is that a purr?), but seriously I do question the degree of 'invention' here, and think that it will only be a matter of time until someone copies and improves the design and undercuts this price.