Most Expensive Things In The World

https://www.psychologytoday.com/blog/curious/201509/how-many-types-happiness-exist
https://en.wikipedia.org/wiki/Hedonic_treadmill
https://en.wikipedia.org/wiki/List_of_most_expensive_paintings
https://theculturetrip.com/europe/france/articles/the-13-most-expensive-artworks-ever-sold/
http://www.telegraph.co.uk/news/worldnews/northamerica/usa/11596376/The-ten-most-expensive-paintings-in-history.html
https://www.pouted.com/10-most-expensive-antiques-ever-sold/
https://jeremyturcotte.wordpress.com/2013/09/06/the-british-crown-jewels/
http://www.dailymail.co.uk/news/article-4167278/25-expensive-homes-2017-revealed.html
https://en.wikipedia.org/wiki/Antilia_(building)
https://jeremyturcotte.wordpress.com/2013/09/06/the-british-crown-jewels/
http://fortune.com/2017/04/04/pink-star-diamond-most-expensive/
http://www.shzell.com/most-expensive-diamonds
http://www.luxurytopics.com/living/furniture/top-10-most-expensive-pieces-of-furniture
http://www.washingtonpost.com/wp-dyn/articles/A56502-2004Dec10.html?nav=rss_style/columns/design
https://wiganlanebooks.co.uk/blog/interesting/10-of-the-oldest-known-surviving-books-in-the-world/
https://www.reuters.com/article/us-magnacarta-auction/magna-carta-fetches-21-3-million-at-sothebys-auction-idUSN1854840520071219
https://en.wikipedia.org/wiki/List_of_most_expensive_books_and_manuscripts
http://www.luxxu.net/blog/worlds-most-expensive-shoes/
http://content.time.com/time/specials/packages/article/0,28804,1917097_1917096_1917095,00.html
http://www.luxxu.net/blog/worlds-most-expensive-shoes/
https://en.wikipedia.org/wiki/White_dress_of_Marilyn_Monroe
http://www.therichest.com/rich-list/most-shocking/6-incredible-things-that-are-literally-priceless/
https://luxatic.com/top-10-most-expensive-shoes-in-the-world/
https://www.forbes.com/sites/jimgorzelany/2016/12/28/the-worlds-most-expensive-cars-for-2017/#a4f2755fcdd5
https://www.digitaltrends.com/cars/1963-ferrari-250-gto-sells-for-52-million/
https://www.weselection.com/most-expensive-restaurants/
http://www.tripbase.com/articles/expensive-islands.html
http://uk.businessinsider.com/elite-traveler-most-expensive-hotel-suites-in-the-world-2017-7/#2-maharajah-pavilion-raj-palace-jaipur-india-from-65000-50600-per-night-the-multi-level-suite-features-double-height-ceilings-crystal-chandeliers-a-terrace-and-a-private-museum-16
https://www.forbes.com/sites/clareoconnor/2012/06/21/larry-ellison-hawaii-lanai-island-david-murdock-dole/#787288dba2a4
http://www.beautifullife.info/automotive-design/worlds-top-10-most-expensive-luxury-yachts/
https://luxatic.com/top-10-most-expensive-private-jets/
http://www.shzell.com/most-expensive-diamonds