The entire print-run of the first edition of Charles Darwin's On the Origin of Species sold out on its very first day. If you are lucky enough to own an original, it's worth an awful lot of money.
But imagine how much more valuable your original copy of On the Origin of Species would be if the print-run had been not of 1,250 books, but of just two? Priceless is the word you're looking for. Utterly priceless!
Which got me thinking. There's money to be made here, if one can lay one's hands on the entire print-run of a future classic book on the day that it first comes out.
But how? How does one purchase an entire print-run?
And then it dawned on me! You disintermediate and publish the book yourself:
Happy birthday, Stense! Look after your present: it's one of only two copies in existence.
(We'll both be able to retire on this, mark my words.)