Even if the monthly payment for a 30 yr fixed were to stay the same the buyer would be better off with a lower price. American mortgages have no prepayment pena

Even if the monthly payment for a 30 yr fixed were to stay the same the buyer would be better off with a lower price. American mortgages have no prepayment penalty, so the buyer has the possibility of refinancing at a lower rate sometime over the payback period or even just making extra principal payments.