So is it moral of me to destroy a copy of "Windows 95 for Dummies"?

What if a person with small children and an elderly, incontinent pet with a penchant for peeing on books wants to buy it - can I sell this book to such a dangerous purchaser who might destroy it?

I love book as much as the next person but the hyperbole about "rare books" is absurd. Nobody is buying the Gutenburg Bible and destroying it for AI. The books in question are certainly not rare enough to be in museums - without titles there's no proof these are anything of real value.