The Penguin Classics Complete Library is a massive box set consisting of nearly every Penguin Classics book ever published and is available on Amazon for only (only!) $13,413.30.
From Edwin A. Abbott to Emile Zola, the 1,082 titles in the Penguin Classics Complete Library total nearly half a million pages--laid end to end they would hit the 52-mile mark. Approximately 700 pounds in weight, the titles would tower 828 feet if you stacked them lengthwise atop each other--almost as tall as the Empire State Building. But don't worry, a nice set of bookshelves will hold them side-by-side just fine.
If you're on the fence about purchasing this item, here's a review from someone who did:
This is an orgy for a book-lover. I have had a wonderful time from the moment I placed the order. They arrived in 25 boxes shrink-wrapped on a wooden pallet, over 750 lbs. of books. It took about twelve hours to unpack them, check them off the packing list (one for each box), and then check them off the list we downloaded from Amazon.com. They take up about 77 linear feet.
It would be fun to see HBO do something like this...a massive DVD or Blu-ray box set of all their hour-long dramas: The Sopranos, The Wire, Six Feet Under, Deadwood, Big Love, True Blood, Boardwalk Empire, Canivale, Rome, etc.