Buy the assessment first, and buy it separately
The most expensive mistake available here is paying for a device before anyone has said out loud what's on your face.
Three different things get called dark spots. Discrete flat brown patches from accumulated light exposure. Larger, blotchier, roughly symmetrical patches influenced by hormones as well as sun, which behave badly when treated aggressively and which can rebound worse than they started. And the brown shadow left behind after a spot, a scratch or an overenthusiastic treatment, which frequently fades on its own if you stop provoking it.
Those three do not share a treatment plan, a timeline or a price. Being treated for the wrong one is how somebody spends a significant sum and ends up with more pigment than they arrived with.
So treat the consultation as a purchase in its own right. You are paying somebody qualified to look at your face in daylight and name what they see, before any package, device or course is mentioned. A consultation that produces a price faster than it produces a diagnosis has skipped the part that carried the value.
A mark that shifts in outline, darkens, grows, bleeds, or refuses to close over has left the cosmetic conversation entirely. Book a dermatologist, soon. We would rather sound heavy-handed here than leave it implied.
