I stopped playing 1e for a reason, and have never looked back. I could afford these, but have no interest in getting them. Because, you know, just what I need: more books I don't read sitting on the shelf.
I actually like game books for their intrinsic value in addition to their practical use. I got many Rifts books simply because of the outrageous and eclectic art. I keep my Shadowrun 1e books for the same reasons. And the 1e DMG was an awesome mess. Possibly the worst organized and most poorly indexed book I've ever gotten to know so well. I even used to have the 1e pocket sized books! Imagine the full books printing in a 3x5 size without adjusting for the change in size. You needed a magnifier just to read it, but to me that was still cool enough.