please help with the following question:

1. fair value less costs of disposal is easiest to determine if there is a signed purchase and sale conteact. ed. obviously, does not have a document of this nature, so he must estimate fair value using various estimate: a. caculate the fair value of the rental property based upon comparable market values less the cost of disposal. b. what are the limitations of using the market value approach? c. do the limitations apply to this case? d. is the market value approach appropriate for this type of asset valuation?

thanks