Once you know what each lender has to offer, negotiate for the best deal that you can. There’s no harm in asking lenders or brokers if they can give better terms than the original ones they quoted or than those you have found elsewhere.
Once you are satisfied with the terms you have negotiated, you may want to obtain a written lock-in from the lender or broker. The lock-in should include the rate that you have agreed upon, the period the lock-in lasts, and the number of points to be paid. A fee may be charged for locking in the loan rate. This fee may be refundable at closing. Lock-ins can protect you from rate increases while your loan is being processed; if rates fall, however, you could end up with a less favorable rate. If that happens, try to negotiate a compromise with the lender or broker.