The Manuscript Review service info page shows a price indication of $50. That is excluding Peerwith fees, so your quote should be $70 - $80. Note: this price indication is only for a review, not full manuscript preparation. The price indication is for a standard review service, read more about what to expect here.
Before you accept a quote from an expert, make sure you understand what is included in the service and what not! Read more here.
If you expect full manuscript preparation including extensive editing, clearly this price indication is not realistic. That doesn't mean that you can't get those services, just ask for it and the expert(s) will provide a quote. But the quotes will be well above this price indication.