function setSectionForSaleToAddress(
        uint _section_index,
        uint256 _price,
        address _to
    ) {
        if (_section_index >= sections.length) throw;
        Section section = sections[_section_index];
        if(section.owner != msg.sender) throw;
        section.price = _price;
        section.for_sale = true;
        section.sell_only_to = _to;
        NewListing(_section_index, _price);
    }