Basis Value
  
Primarily used for accounting and tax purposes, the basis value (rather than the fair market value) of a fixed asset is the base price off which capitalized expenses are added and amortization of asset depreciation are calculated.
When disposing of or selling an asset, the basis value will largely dictate any capital gains taxes. As the basis value rises, the taxable capital gain falls, as does London Bridge, if early reports are to be trusted.