Upon the resale of a restricted ownership unit, all items of property that are permanently affixed to the unit or were included when the unit was initially restricted (for example, refrigerator, range, washer, dryer, dishwasher, wall-to-wall carpeting) shall be included in the maximum allowable resale price. Other items may be sold to the purchaser at a reasonable price that has been approved by the purchase of central air conditioning installed subsequent to the initial sale of the unit and not included in the base price may be made a condition of the unit resale provided the price, which shall be subject to ten-year, straight-line depreciation, has been approved by the administrative agent. Unless otherwise approved by the administrative agent, the purchase of any property other than central air conditioning shall not be made a condition of the unit resale. The owner and the purchaser must personally certify at the time of closing that no unapproved transfer of funds for the purpose of selling and receiving property has taken place at the time of or as a condition of resale.