Change of timing belt

Hello dear Volvo community, I would be very interested if someone with his elk is already ready to change the timing belt or have already changed. As I have experienced the intervals of the V50 at 250,000km, that is hammer. The timing belt can be that he does not tear around but the around 8 water pump etc ) I will change mine at 85 t km about including the water pump. I would also like to know what it costs? ? The Andreas would have to know that. a nice evening gruss attila