THESAURUS
not buy
be unmoved, be unwilling, beg off, decline, decline to accept, deny, disagree, disallow, disbelieve, disclaim, discredit, dissent, gag on, hold out against, misbelieve, negate, negative, not admit, not believe, not consent, not hear of, not swallow, not think of, refuse, refuse consent, refuse to admit, refuse to credit, reject, repudiate, resist entreaty, resist persuasion, say nay, say no, stand aloof, turn down, unbelieve, vote nay, vote negatively
