A pea in the pod white sleeveless tunic

Stretchy heafty weight cotton poplin top suitable for business or dressed up. Long center hidden zipper adds style and darts on the back create a beautiful silhouette. This is a fine piece of clothing and has been dry cleaned with no rips or marks but now I see a mark on the lower front which might be dirt or a stain (see photo). I am willing to price this very fairly so please send me an offer!