Is it possible to get blepharoplasty on just one eyelid? How much would it cost and is local anesthesia possible? (Photo)

There is no substitute for seeing someone who actually knows what they are doing.  We are unfortunately pretty rare.  The reason is simple. Many surgeons are not really aesthetic eyelid reconstruction specialists.  The do insurance based reconstructive eyelid surgery.  They are not really prepared to perform microsurgery to address small aesthetic issues.  You will not find the surgical skills you need to help you and not wreck you close to home or even necessarily in your home state.  Do not get surgery with the wrong person.
You issue will not be solved with a brow lift, or botox, or filler service. You have a bilateral compensatory eyebrow elevation.  Having a standard blepharoplasty will wreck you.  Standard blepharoplasty removes skin, muscle and fat.  I promise you that whoever agrees to do this will miss what is actually going on.  The effect of the standard blepharoplasty will be Post Upper Blepharoplasty Syndrome (PUBS).  This will result in a droopy, hollow upper eyelid with upper eyelid ptosis.
The real problem here is an early levator dehiscence.  This is the basis for the compensatory brow elevation.  What you need is a procedure I call micro-anchor blepharoplasty. The elevator tendon needs to be identified and the disinsertion needs to be corrected.  You need almost no skin or fat removed.  The surgery is about structure.  By strengthening the elevator tendon, the compensatory brow elevation will relax after surgery.  You have a slight orbital asymmetry but this is not the basis for your aesthetic concerns. My out of town patients who fly in stay in the Beverly Hills area for about 8 days when they travel for this surgery.

From the limited information in the photograph it looks as of the left brow is slightly lower than the right. This may be the reason for the asymmetric lid show. Physical examination would be required to sort this out.

It is not unusual to have subtle differences in the two eyes and in fact, on the two sides of the face.  Although your eyebrows are a little uneven, they do not need to be lifted.  Your upper eyelids are slightly uneven and it is your left upper eyelid that has a little more "hooding" and although I would not recommend upper eyelid surgery for you, if you absolutely wanted to Make the eyes look more even, you would need an upper eyelid Blepharoplasty(lift) for the left not the right side as you assumed.