A municipality may exercise the power of eminent domain to develop an industrial park with respect to property located within the municipality or within the urban growth boundary. A municipality or county, or both, operating a joint park may exercise the power of eminent domain for development of the park within the boundaries of the county and within an urban growth boundary and a planned growth area. A municipality must obtain a certificate of public purpose and necessity from the Department of Economic and Community Development for the exercise of the power of eminent domain even if no funds will be borrowed. The certificate must be based upon a finding that the municipality was unable to acquire the property through good faith negotiations or to acquire any alternative property of comparable suitability. Good faith negotiations are established if the municipality made an offer to purchase the property for an amount equal to or greater than the fair market value determined by the average of at least two appraisals by independent qualified appraisers. T.C.A. § 13-16-107(f).