By far the most valuable Lincoln cent is a 1943-D coin struck in error on a bronze blank instead of a steel blank. As of this writing (2015) it sold for $1.75 million.
More than likely the 1944 matte proof penny. It was stuck in steel instead of copper.
The most expensive Canadian cent is the 1936 DOT, it sold at auction for $402,000 and there are only 3 known. I will add a link to the auction when it sold in January.
A vintage Bugatti sold at auction in California for about $30 million.
The most valuable "Wheat Penny" is an error coin not a regular issue coin. The only known example of a 1943-D Lincoln cent that was struck on a bronze planchet by mistake instead of steel, sold in 2010 for a little more than 1.7 MILLION dollars. For regular issue coins the 1909-S VDB is still the King.
There were two Habitant bank tokens sold together at a Christies Auction for $418 for the pair.
On 7/12/2012 a 1992 D Close AM graded PCGS MS64RD sold for $20,700 on Heritage Auctions. On 7/12/12 a certified MS-64RD sold for $20,700.00 at an Heritage auction. To date this is the only example to be sold at any auction.
The most expensive musical instrument sold at an auction in 2011 would be the 'Lady Blunt' Stradivarius violin sold for $15,875,800 by Tarisio Auctions In London.
I believe it sold for a whopping $100,000,930,099 in a US auction in Oklahoma in 1969.
The highest price ever paid for a car at auction was $11 million paid for a 1931 Bugatti Type 41 Royale Sports Coupe sold by the auction house Christie's in 1987.
Each auction puts out a list of cars they sold and the price they sold for.
Gunbroker is an AUCTION site. Many guns will begin with a penny bid, but they are sold for the HIGH bid. That penny does not include shipping costs, or the fee that you will pay the gun dealer it will be shipped to to transfer the gun to you. Guns that start at a penny RARELY sell for a penny.
The most expensive of his paintings sold at auction was Portrait of Dr Gachet. It was sold in 1990 for $ 82.5 million.