submitting such application, in an amount equal to the purchase price for the project agreed to under subparagraph (A) of this paragraph, but only if the Secretary determines that— (A) such eligible purchaser and the owner of such multifamily housing project have voluntarily agreed to a sale of such project to the eligible purchaser for an amount not exceeding the fair market value of the project as of the time of provision of assistance from the Fund for purchase of the project, as determined by the Secretary