54-59 chev bed, step rails

hey guys. new here. i inherited two sets of chev bedsides. one set is 88 3/4". the other is 79 3/4". the steps are 7'. they have been inside a conditioned space for at least 30 years and have only surface rust and are completely solid. i have no idea what they are worth or really the best place to offer them. any suggestions?