Can I just get a Corset Platysmaplasty? (photos)

Hello and thank you for your question. Based on your photograph, you may
benefit from a mini neck lift with a platysmal plication.  Some skin tightening will be needed also, and therefore short incisions behind the ears would also be needed.  If good technique is used,
this can be done with minimal scarring and can result in a natural look, not
over-done look, with rejuvenation of your neck.  Cost varies based on geographic region and surgeon expertise.  Make sure you specifically look
at before and after pictures of real patients who have had this surgery
performed by your surgeon and evaluate their results. The most important aspect
is to find a surgeon you are comfortable with. I recommend that you seek
consultation with a qualified board-certified plastic surgeon who can evaluate
you in person.
Best wishes and good luck.
Richard G. Reish, M.D.  FACS
Harvard-trained plastic surgeon

You appear to have excellent skin tone and quality by the photos. Something to think about as a potential nonsurgical option would be Botox injections along the medial aspect of the platysma bands bilaterally. While this is a nonsurgical option and requires repeat treatments every 3 to 4 months, it may be a temporary option until a surgical procedure would be warranted. A more permanent option would be a neck lift with platysma band plication. This would involve a small incision beneath the chin. This is an excellent option as you have very good skin quality.