HRS §490:2-205
When a merchant's offer to buy or sell goods stays open
A merchant's written offer to buy or sell goods can be made firm if it says it will stay open and is signed. This firm offer cannot be revoked for the time stated, or for a reasonable time if none is given, but never longer than three months. If the offeree's form is used, the offeror must sign the firm offer term separately.
The statute, as written — Firm offers
An offer by a merchant to buy or sell goods in a signed record which by its terms gives assurance that it will be held open is not revocable, for lack of consideration, during the time stated or if no time is stated for a reasonable time, but in no event may such period of irrevocability exceed three months; but any such term of assurance on a form supplied by the offeree must be separately signed by the offeror.
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