The agency shall establish maximum sale prices for the initial sale of residential structures, the acquisition, construction, or rehabilitation of which is financed by the agency in anticipation of sale to persons and families of low or moderate income. The agency shall also establish a price for any residential structure whenever the buyer of such residential structure receives a mortgage loan from the agency. The maximum sale prices established by the agency pursuant to this section may provide a reasonable profit to the seller while serving the purposes of this division.