An art collector sent a letter to a painter on May 1st, offering to purchase her latest masterpiece for $50,000.
The letter stated, 'This offer will remain open until May 10th.' The painter mailed a letter of acceptance on May 5th.
On May 6th, before receiving the painter's acceptance, the collector sent a fax revoking the offer.
The painter received the revocation on May 7th, and the collector received the acceptance on May 8th.
Is there a valid contract?