As much as i hate to say it, if ssc charged 250 at the start of the year for grevious, with all of his research and development since around 2011, why are so many collectors on here overwhelmed that 3-po would fall in a similar price bracket. Grevious definately has more articulation and accessories, but it's taken all this time, approx 8 years, for sideshow to be ready to release 3-po. I imagine a great deal of engineering has been invested in him before he ever saw the light of day, and so, would be reflected in his pricing.
R2 almost seems like a steal now, especially with some rewards thrown toward him, and as some have said, was the 'baited hook' for us hungry collectors.
Still not out of this hobby, but will try to focus mainly on characters that i enjoy.
The pricing on general human figures, i believe, is where the issue lies.