I gotta admit, I did get a "new" (it wasn't) Super Famicom just because I was sick of my SNES's turning yellow, and it just plain looks cooler. SFC's can discolor as well, but it's far less common. Cost me like $70 I think?
The "new" system had some issues, so I bought a beat to hell dirty system for like $15 and swapped motherboards.