I would suggest contacting an instrument dealer in The Netherlands, and inquiring as to the cost of a new D.S. model Kalison CC. My guess would be that a 5-year-old D.S. Kalison would sell for anywhere between E2,500.00 to E5,000.00.
If you cannot find a dealer for Kalison tubas in the Netherlands, you could inquire with some large music houses in Deutschland. Tucci's Horn & Tuba Center, just outside Muenchen, is an excellent place to find a great new or used tuba, and not far from some great skiing, too ;^)
Lee Stofer