According to the Wall Street Journal article by Arden Dale, Feb. 27, 2007; "It may soon become trickier to get an item appraised for tax purposes. The Pension Protection Act, passed in August, puts appraisers in the sights of the Internal Revenue Service by saying they can be penalized for valuations the agency later decides are off the mark."
"The move marks a big change because taxpayers, not appraisers, historically have borne the brunt of a wrong valuation. One result: The cost of getting something appraised may well rise."
"Appraisals are used for a number of purposes in tax filings. For instance, noncash assets donated to charity are often appraised so the donor can claim the value as a deduction on his income-tax return and lower his tax bill."