Firm offer,

Definition of Firm offer:

1. Irrevocable, written, and signed offer regarding the sale or purchase of specified goods or services at specified prices, and valid for a specified period. If no closing or expiration date is specified, the offer is normally considered to be open for 30 days after its presentation. Also called confirmed offer.

How to use Firm offer in a sentence?

1. The firm offer was now complete and we could rest easy knowing that everything was in order and ready to go.
2. Bud and Sally had been searching for the perfect house, and finally found one on Main Street, so they submitted a firm offer .
3. You should try to make a firm offer and hope the other person will see that it is legit when in a negotiation.