I think he is around 60 euro's, but he s excellent value. 06 62 66 32 87.
Any other osteopath you seem to have them back on a regular basis, but with Sernin his treatment seems to last a much longer time. As I say he does speak English, so don't be scared of speaking with him. Tell him, that Di Allen sent him your way, and it will be slightly cheaper.
If you could box up and come closer to him then the cost will be less bearing in mind he is from Coutances. My yard is open for use, or maybe Pen's is slightly closer.