This excerpt taken from the VRSN 10-K filed Mar 3, 2009.
Valuation of assets held for sale
Disposal groups classified as held-for-sale are measured at the lower of their carrying amount or fair value less cost to sell and are not depreciated or amortized. Classification of our disposal groups as held for sale occurs when sufficient authority to sell the disposal group has been obtained, the disposal group is available for immediate sale, an active program to sell the disposal group has been initiated and its sale is probable within one year. If at any time these criteria are no longer met, the disposal group would be reclassified as held and used. We evaluate the held for sale classification and the fair value of such disposal groups at each reporting period. The fair value of assets held-for-sale is determined considering active bids from potential buyers and also using the income, the market or the transaction valuation approaches or a combination thereof. The fair value analysis using the income, market and transaction approach for assets-held-for sale is similar to the fair value analysis of reporting units for goodwill impairment described above and requires significant judgment.