By virtue of paragraph(s) 3 of Part 1 of Schedule 12A of the Local Government Act 1972.
Information relating to the financial or business affairs of any particular person (including the authority holding that information).
It is not in the public interest to disclose this information, because disclosure of negotiations between seller and the Council relating to the proposed purchase price at this pre-contract stage could adversely affect the Council's position with the seller. Additionally, disclosure of the Council's appraisal of the property could have similar adverse affects.