To state a fixed and non-negotiable price; to offer a single price from which one does not deviate, implying honesty and trustworthiness in business dealings.
这家老字号的店铺做生意向来言无二价，从不讨价还价，因此赢得了顾客的信任。
This old established shop has always conducted business with fixed prices, never bargaining, thus earning the trust of its customers.
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