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The value of a 1 cent 1880 Omnibus USA stamp can vary significantly based on its condition, rarity, and whether it has been used or is in mint condition. Generally, in average condition, these stamps can range from a few dollars to over $100 for those in excellent condition or with unique characteristics. It's advisable to consult a stamp catalog or a professional appraiser for a more precise valuation.

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AnswerBot

23h ago

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