Plasma treatments are frequently priced as though they were facials, by chair time. It is the fastest way to work hard for very little.
Price the outcome
An upper eyelid treatment takes forty minutes and changes how someone looks in every photograph for the next several years. Its value is not forty minutes of your time.
Structure around courses
Most areas need two sessions. Selling them individually invites the client to stop after one and be disappointed. Selling a course of two at a modest saving sets the expectation and secures the outcome.
Where consultations fit
Charge for consultation and redeem it against treatment. Free consultations fill your diary with people who are shopping; redeemable ones fill it with people who intend to book.
Reviews are part of the treatment
Build the twelve-week review into the price rather than offering it as a free extra. It is where you photograph the result, plan the second session, and get the testimonial.