Does anybody know what his prices for FFS are like? For some reason I always think he's expensive and more expensive than dr Bart, but that thought is based  on nothing hence my question.

Also, does he also do consultations by e-mail?

He does quick consultations by email but they are not very detailled. His in person consultations are 100 EU. He will however start to give away his business to someone else over the next years, working in a team for now and then slowly retreat. AFAIK Dr Bart is really one of the least costly options in Europe, so I can imagine that NvdD is more expensive

It would be a great loss if he quit. That man is a legend and pioneer! If I ever had FFS I would go to him.