Rarson, they are valued at what the market bears I guess. Looking back, I consider myself lucky I paid MSRP for mine. I am a bit surprised at the value they retain. I think that says a lot for Toyota and also the options in general the public has these days (ok, I am getting off topic).
Urbancustoms, I think the later 1UZ & 3UZ intakes will fit. The 2UZ will not for sure (tried with hood almost closed). There is more clearance than those pics would suggest since the hood has a bit of a bulge to it. Besides I don't think the sc400 hood is much if any taller than the Supra hood.