It's not the brightness of the eBay photo I think is more accurate, it's the color. No version I've ever seen has as much green as the Jedi1.net image. All of the Jedi1 scans of the hospital scenes seem to have a yellow-green cast to the whole image, including skin tones.

And as far as the JSC Empire goes, to my eye it's too yellow as a whole. Even if Hoth isn't as blue as some of us might have thought, I really don't think it's as neutral as in the JSC. Also, to provide another example, 3PO looks too pure yellow to me, almost tending toward greenish - basically, the color of a certain bodily fluid. He's not yellow, he's gold (with a bit of a brass/bronze tinge). Skimming through the whole film, I keep finding scenes where something looks too yellow.