Should I correct my ears? I am only unhappy with my left ear so is the price any cheaper for just one ear? (Photo)

Otoplasty, is the surgery that treats cosmetic issues which the shape and angle of the ears. The issue can affect one or both ears, and in the latter case the severity can be different too. In either case, there are time tested surgical techniques that can differentially address the issue. If only one ear needs treatment, it obviously demands less and will be cheaper. The surgery in adults can be done under local, twilight or general anesthesia.

Dear ozi4,if you are unhappy with the appearance of your ears, there is a way to correct it. If you are considering a surgery, I would suggest you to consult a board-certified plastic surgeon. You will get the best recommendations after a thorough examination. The cost of unilateral surgery should be lower than in case of bilateral otoplasty.Daniel Barrett, MD, MHA, MS 
Certified, American Board of Plastic Surgery  
Member, Am. Society of Plastic Surgery

Besides the usual traditional otoplasties, where the ear is cut open and the cartilage is incised or partly excised, there is meanwhile also the minimally invasive Dr. Merck Stitch Method. With this method, the ear is no longer cut open, and the patient can check and co-determine the new position of his ear in a hand-held mirror.

A prominent ear may be caused by a lack of proper ear ridges (antihelix and superior crus) in which the cartilage did not fold properly during development.  This developmental problem is what most often leads to the ears looking prominent.  However, the size of the cartilage bowl of the ear (concha) or the angle of the bowl from the bone behind the ear (mastoid) may also be greater than desired.  One or both ears can be affected, and when both ears are affected, they can be affected to different degrees.  Prominent ears can be corrected by an operation called an otoplasty, which involves an incision made behind the ear where it is hidden from view.  The absent folds can be created with sutures, the ear can be pinned back with sutures to the mastoid, and the cartilage can be reduced when needed.  Every ear is different and is treated based on the individual problems present.  Treating both ears would require some additional operative time and thus cost.  I would recommend an in-person consultation in which specific recommendations can be made based on your unique ear anatomy.
Ziyad Hammoudeh, MD

Asymmetry of ears is common but can be minor. Since, the difference between your ears are small, correcting one side may cause the other side appear more pronounced. 

One or both ears can be performed, it's really up to the patient themselves. If one ear is more asymmetric than the other one, a unilateral otoplasty is performed. Performing only one side is cheaper than performing both sides. In our practice, we perform an otoplasty procedure under local anesthesia, and patients tend to tolerate that very well.

Your picture does show some assymetry between the ears.  If this difference is enough to bother you then I would consider a consultation with a board certified surgeon.  After having had an exam, you can better discuss your options and how you would like to proceed. 
Incisional wounds from an ear surgery are behind the ear and not typically seen, but it's important to remember that an incision will be made and everyone heals differently.  Usually, however, these scars heal very well without much visible "evidence."