Don't expect any answer from him.
Just looking at his post history, there's no sign of any reply to those threads that he has made to advertise that website and service that he does. That's really a type of poor marketing that there's no answering for such queries that should help him/them gain a book sale.
I also visited their website and tried to ask their customer support about the quotes, but they said that we must send them a 'free consultation' request, but I was not interested in doing that. They should keep all things transparent instead of making their service buyer do the hassle of first reaching them and then knowing the prices. It is not only poor marketing, but a cheap way to advertise a website that itself isn't too active and we don't know who this guy is (is he from the team or just a fanboy/affiliate).
I agree with you that they should make it transparent and be on point once a person asks them. But if they're going to ask the inquiry for a request for a free consultation.
It's easier for them to put that on their website to be visible and there's no need for any query just for that very common question that has probably been asked to them so many times. It could save them time and the inquirers time.