What degree of orbital dystopia do I have and is it correctable? What would the ballpark cost be? (photos)

It may be possible to improve the eye asymmetry through combination of orbit and eyelid surgery including customized orbital decompression. See following video. Need personal consultation. Skype consultation available.

It is not worth having craniofacial surgery to fix this.  That surgery is reserved for severe trauma and abnormalities that prevent you from looking human.  That does not match up with your subtle issue.  It is not worth taking apart your skull base and risking blindness to shift the orbits around.  Please understand that craniofacial surgery is not cosmetic surgery.  The results are always rough and you will be worse off messing with your face this way.  See a psychologist to help you deal with your facial insecurities.  

You have vertical orbital dystopia where the one eye sits lower than the other one. The lower one is the abnormal side and sits about 4 to 5mms lower. A 3D CT scan is needed for determining the actual vertical discrepancy as well as the shape of the orbit, cheek, and brow bone on the affected side. While you may never be able to get the lower eye exactly up to the level of the normal one, the combination of orbital floor/rim augmentation, changing the downward tilt of the inner corner of he eye, upper eyelid ptosis repair and reducing the lower edge of the brow bone can help.