In general, 1990 Lincoln cents are worth their face value of one cent. However, certain errors or varieties can increase their value to collectors. For example, the 1990 Wide AM cent, characterized by an unusually wide spacing between the letters "A" and "M" in "AMERICA," commands a higher value among numismatists. The doubled die variety of the 1990 Lincoln cent, where certain design elements appear doubled due to a die error, is another sought-after variety that carries additional value. However, since such errors are relatively rare, unless your 1990 Lincoln cent falls into one of these special categories, its value remains at one cent.