What is the average cost for a laser bra breast lift? In L.A.

 I would recommend
seeking the advice of a plastic surgeon and having a consultation to help you
determine the cost. 

Cost factors vary significantly for a number of good reasons: Prices vary greatly because the surgery itself encompasses a wide range of techniques that can be performed to different extents. My recommendation is to first find the most qualified surgeons where you want the surgery performed that are board certified by the American Board of Plastic Surgery you trust, then compare prices between them. See the below link on suggestions on how to find the most qualified plastic surgeon for your procedure. General Factors that influence the price of plastic surgery include:
1. Location - Will it be performed in a hospital with an overnight stay, an independent out- patient facility or a doctor’s office? Geographical location also has a significant influence. RealSelf has average charges for most areas of the USA. 2. Type of Anesthesia - local, IV sedation or General Anesthesia? Will a board certified anesthesiologist, nurse anesthetist, or an RN be used?            3. Experience and training of your surgeon. The best and longest trained is most often a plastic surgeon board certified by the American Board of Plastic Surgery           4. Length and Complexity of Surgery - how difficult will your surgery be and how long it will take, etc. Will other complementary procedures also be also performed during the same surgery?

Thank you for the question. 
When it comes to cost of surgery, there may be many “variables” involved. The specific surgeon's credentials/experience level (or lack thereof), the specific geographic area you are looking at, the different operations available, the location of the procedure ( quality of surgery facility), type/quality of anesthesia provider, type of breast implants (if used)… are some of the potential variables involved. You will find average costs of surgery listed on this website, and on individual plastic surgeon's websites as well.
In regards to outcome of the planned procedure, more important than costs of the procedures will be careful selection of your plastic surgeon. I would suggest starting with the American Society of Plastic Surgery and/or the Aesthetic Society of Plastic Surgery to obtain a list of well experienced board-certified plastic surgeons. Then, I would suggest you visit a few surgeons whose practices concentrate on aesthetic surgery. ***Ask to SEE lots of examples of their work AND preferably speak/see patients who have had similar procedures done. Be very careful with your decision-making. You will find, while doing your due diligence, that there are many different “specialties” who will offer their services to you; again, I strongly recommend you concentrate on surgeons certified by the American Board of Plastic Surgery.  
I would also suggest that you do not base your selection of plastic surgeon primarily on costs of surgery; keep in mind that revisionary surgery may be more costly in many ways.  I hope this, and the attached link, helps. Best wishes.