Cons: Certain parts of the art and antiques market have been hit hard by the poor economy, reducing the value of your assets. Paintings by well-known artists have continued to appreciate, but prices of furniture and other antiques have fallen as much as 40% in the past year or so. Auctioneers will charge a flat commission of about 10% to 20% of a $10,000 sale. What's more, you may owe a collectibles tax of 28% on any profits.
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Last updated August 22 2008: 12:36 PM ET