If you are unsure about how to compare and negotiate interest rates across different banks, or if you have complex financial needs and goals, you may benefit from seeking professional advice from a financial planner, a broker, or a lawyer. They can help you assess your situation, identify your options, and negotiate on your behalf. They can also explain the terms and conditions of any contracts or agreements you sign, and advise you on the tax implications and legal risks of any transactions. However, be aware that professional advisors may charge fees or commissions for their services, and that they may not be impartial or independent, so do your due diligence before hiring them.