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Update: I got quoted 1500-2000 grafts through an online consultation to fill my crown and restore some density throughout. I think using dry pictures above did not fully demonstrate the extent of my hair loss, so here are some pictures of my hair wet, one with a part and one without. Do the opinions given above still apply?

So i am soon turning 25 and was thinking of getting a hair transplant to cover mainly my crown. I am a diffuse thinner so my hairline is fine but the density on top is lower than on the sides of my head, it is still not that bad with the exception of the crown. I have been on finasteride/minoxidil for 2 years and while i have gotten some regrowth and i am maintaining, it doesn't look like i can get anything else out of them. I have attached a couple of pictures taken on the same day with different lightnings. How many grafts would i need for decent crown coverage? I was thinking around 2000, with anything extra being used for density where needed. Any responses are appreciated.