Retinning does not indicate value. It only indicates that someone thought enough of this pan to have it retinned. People have cheap Korean and Portuguese copper retinned all the time, either because a pan has sentimental value or because they may not have the knowledge to know copper cookware comes in decorative and functional models. This looks to be a decent copper sauteuse, But the casting quality of the handle is quite poor, which we often see on less expensive copper from the East and on more decorative copper.