How much should I expect to pay for melasma treatment?

Lately, I've been really worried because it seems like I'm getting melasma all over my face. I've always had a little bit, but it feels like it's gotten worse recently, which is really stressing me out. I'm wondering if I should visit a dermatologist to get some treatment before it gets even worse. It seems like whitening cosmetics aren't working anymore. I looked into it and found there are many different ways to treat melasma, including various types of lasers. The cost of treatment seems to vary widely, so roughly how much should I expect to pay? It seems like many people opt for package deals, so I'm very curious about the approximate cost, number of sessions, and treatment frequency. I have absolutely no information, so I have no idea. If anyone knows, I would be very grateful for your answer.