I am late to this thread, good read so far. As far as Planet 1, outside if a truely sun faded cover, all the Planet 1's I have ever seen were very close color wise. There seems to be certain issues that are more prone to color changes and other issues like #1 that has pretty consistent coloring. As someone states earlier in the thread , the only true color evaluation can be made when books are aide by side. Consider the three books below, this is the exact same book with scans from 3 previous owners