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The world's most expensive limited-edition pen - Montblanc and Van Cleef & Arpels created a US$730,000 ballpoint pen, called Mystery Masterpiece, which is adorned with 840 diamonds and 20 carats in gemstone. Only nine were made and each reportedly takes a year and a half to craft.

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The world's most expensive bathtub - Cut from 20,000 lbs (9,071 kg) of Amazonian crystal stone, Baldi created the world's most expensive bathtub. It weighs over 4,000 lbs (1,814 kg), and sells for US$845,000, boasting the raw beauty of crystal along with the owner's ridiculous wealth.

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The world's most expensive parking spot - Only in the heart of downtown Manhattan will you find a parking space valued at US$1 million. New York unsurprisingly holds the record for having the most expensive parking spots for sale in the world.

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The world's most expensive dog - A Tibetan Mastiff sold for over US$1.5 million in 2011 to a Chinese multimillionaire. The prized pup is called Big Splash.

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The world's most expensive bed - The Magnetic Floating Bed is as close to sleeping on a cloud as it gets! Using innovative technology in magnetic systems, the bed remains suspended in the air and supports 2,000 lbs (907 kg) of applied weight. It'll just cost you US$1.6 million.

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The world's most expensive vinyl record - Wu Tang Clan's 'Once Upon a Time in Shaolin' LP was produced as a single copy, and famously bought by Martin Shkreli for US$2 million.

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The world's most expensive Monopoly board game - A San Francisco-based jeweler created the custom Monopoly set in 1988, made from 23-carat gold with ruby, sapphire, solid gold, and diamond elements, worth US$2 million.

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The world's most expensive television - Stuart Hughes's Prestige HD Supreme Rose Edition television has diamond buttons, with 18-carat pink gold and 48 additional diamonds used in the frame, with a price tag of US$2.25 million

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The world's most expensive postage stamp - The Swedish "Treskilling" Yellow stamp was first sold in 1996 for just over US$2.25 million, but it was sold again in 2010 for an undisclosed sum. It's reported that the auctioneer has since confirmed that the stamp sold for twice the 1996 amount! It also holds the record for being the most expensive item on this planet by weight.

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The world's most expensive clock sold at auction - Our time-telling technology has far advanced since the 18th century, but the Louis XVI Ormolu-Mounted Ebony Grande Sonnerie clock still sold for US$3 million.

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The world's most expensive baseball - Mark McGwire's baseball, which he used in his 70th and final home run with the St. Louis Cardinals in 1998, sold for US$3 million the following year.

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The world's most expensive piano - The "Crystal Piano" used in the Olympic Games at Beijing was sold at auction for US$3.2 million.

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The world's most expensive comic book - A copy of 'Action Comics #1' was sold through an online auction to Metropolis Collectibles for US$3.2 million.

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The world's most expensive purse - The Mouawad 1001 Nights diamond purse set and still holds the Guinness World Record for its value of US$3.8 million. The Emirati creation was handcrafted by artisans who reportedly took a total of 8,800 hours to complete the unique handbag, which features 18-carat gold and 4,517 diamonds.

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The world's most expensive atlas - 'Ptolemy's Cosmographia' dates back to 1477, and was sold at auction for nearly US$4 million. The prized atlas was originally printed in Bologna, Italy, and had been part of the Wardington Library Collection.

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The world's most expensive pair of cuff links -

The Jacob & Co Fancy Yellow Diamond Masterpiece Cufflinks are valued at US$4.2 million, and boast a platinum setting with 18-carat yellow gold, and two radiant-cut yellow diamonds with 41.42 carats, along with 50 smaller diamonds.

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The world's most expensive photograph ever sold - The photograph 'Rhein II' was taken by German visual artist Andreas Gursky in 1999, and a print sold in 2011 for the record-breaking price of US$4.3 million. That's nothing in comparison to the bidding price of paintings, however.

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The world's most expensive carpet - An 18 x 19-foot (5.5 x 5.8-meter) carpet from the mid-1700s that belonged to Louis XV, called the Louis XV Savonnerie Carpet, sold at auction in 2000 for US$4.4 million.

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The world's most expensive veteran car - The oldest Rolls-Royce, a two-seater made in 1904, was sold at auction in London for over US$7.2 million in 2007.

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The world's most expensive coin - The 1933 Double Eagle was once just a gold coin worth about US$20, but now it's worth over US$7.5 million.

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The world's most expensive audio speakers - Hart Audio speakers reportedly have a price tag of US$7.8 million, and boast a 76-cm cabinet cast in 24-carat gold.

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The world's most expensive limited-edition tablet - Luxury goods design brand Stuart Hughes crafted the iPad 2 Gold History Edition, worth US$8 million. Only a handful were made, and they're encrusted with gold, diamond, Ammolite, 53 gems, 12.5-carat diamonds, and even dinosaur bone.

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The world's most expensive autograph - George Washington's signature on Acts of Congress is ranked the most expensive autograph to date, having been sold for US$9.8 million at a Sotheby's auction in 2012.

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The world's most expensive wedding dress -

A dress adorned with 150 carats of diamonds was created for the Luxury Brands Lifestyle Bridal Show in 2006, made in partnership by Martin Katz Jewellers and Renee Strauss. Any bride who wants to walk down the aisle in it should have US$12 million at the ready.

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The world's most expensive bra -

The Heavenly Star Bra by Victoria's Secret features 1,200 pink sapphires with a 90-carat emerald at its center. The diamond detail alone is worth US$10.6 million of the total value of US$12.5 million.

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The world's most expensive book of scripture sold at auction - The Bay Psalm Book dates back to 1640, and is credited with being the first book ever printed in British North America. In 2013, it sold in auction for over US$14 million. Just 1,700 copies of this book were produced, but this copy was one of the 11 remaining.

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The world's most expensive license plate -

The most expensive license plate ever sold, according to Guinness, consists of a single digit: one. UAE businessman Saeed Abdul Ghaffar Khouri bought it during an auction for US$14.2 million, and he's quoted saying: “The price is fair. After all, who among us does not want to be number one?”

(Photo: Wikimedia/CC BY-SA 2.0)

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The world's most expensive flower - A bouquet of Juliet Roses would cost about US$15.8 million! This particular species of rose took 15 years to create, and one of the biggest draws is its unique method of bloom, as its buds shift in tone and color to create a uniquely spectacular blossom.

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The world's most expensive musical instrument sold at auction - Lady Blunt is the name of a Stradivarius violin, crafted by Antonio Stradivari in 1721, which sold at auction in London for nearly US$16 million.

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The world's most expensive custom phone ever made - Nita Ambani, wife of successful Indian businessman Mukesh Ambani, is the proud owner of the custom-designed Falcon Supernova iPhone 6 Pink Diamond. The phone itself is 24-carat gold, featuring an enormous pink diamond and platinum coating, coming together for a cool US$48.5 million.

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The world's most expensive domain name ever sold - The domain name "CarInsurance.com" was reportedly sold in 2010 for a whopping US$49.7 million—and all to host a site that predictably helps you find the best car insurance rates!

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