This is interesting, because at first Gipper lost value in the collectors' market, at least for a few years.

FORBES: BRAND HYPOCRISY

Some 83% of collectors surveyed said that the emotional value of buying art was the most important factor.

FORBES: Collectors Buy Art Because They Love It (Or Want to Take Out A Loan With It)

For some collectors, it's about the bragging rights, the eye-candy value.

WSJ: The Art of Collecting

Their paintings were the most expensive school of art ever when the great American collectors such as Pierpont Morgan, Henry Clay Frick, Henry Huntington and Andrew Mellon sent their value to the skies.

ECONOMIST: British pictures are too snobbish for American collectors