I am also an obsessed collector. However, I am lucky and relieved NOT to be a completist (I am very happy for that!). I only buy books I find attractive or otherwise essential.

I find the Vance Integral Reader's Editions attractive, and like Paul Rhoads's decorative illustrations. But I could not afford the whole set, and neither did I have suitable room for it. Someone should do a reprint of the same format and design, selling individual volumes!