Start here: what PRP can and cannot actually do
Reviews of clinical trials show a modest, statistically significant increase in hair count for pattern hair loss in many but not all patients, with the best results seen in early thinning where miniaturised follicles are still present. It is not a cure, it does not regrow hair where follicles are genuinely gone, and a bald area with no follicles left will not respond to it regardless of how many sessions are purchased.
This needs understanding before any price is compared, since it shapes what a reasonable outcome looks like. You are paying for a reasonable chance of a modest, measurable improvement in existing thinning hair, not for a transformation, and a clinic that implies otherwise is marketing rather than describing the evidence accurately.
It is worth comparing this honestly against how other treatments in this category are usually priced and judged. A hair transplant is priced against a visible, countable number of grafts actually moved and a result that, while it genuinely takes a year to fully mature, is reasonably predictable once donor density has been properly assessed by an experienced surgeon. PRP, by contrast, is priced against a biological response that genuinely cannot be predicted for any individual patient in advance, which is a fundamentally different kind of purchase altogether, and the price should be judged with that real uncertainty built into your expectations from the very outset.