An affordable 1879 United States Numeral postage due stamp
From the article: "...In their use in the United States, postage due stamps were to be applied to any underpaid mail piece to show the amount collected from the addressee. ...The Scott Specialized Catalogue of United States Stamps and Covers values the 3¢ Numeral postage due stamp in very fine grade and unused, original gum condition at $100 and in mint, never-hinged condition at $280. A used example in very fine grade is valued at $6. Shade varieties noted and valued are pale brown, deep brown and yellowish brown."
Article Reference: www.linns.com