What are Hapimag shares really worth?

Who could provide better information about the value of a Hapimag share than the timesharing company itself? The Hapimag annual report for the relevant year gives the "average" repurchasing price.

Average repurchasing price 2005 per share in CHF 4,037.00

Average repurchasing price 2006 per share in CHF 3,759.00 

Average repurchasing price 2007 per share in CHF 3,662.00

Average repurchasing price 2008 per share in Euro 2,105.00

Average repurchasing price 2009 per share in Euro 2,071.00