Lots of people invest heavily in their Logos Bible Software collections. My uncle estimates that he has spent tens of thousands on it.
Fortunately Logos allows users to bequeath their licences to whoever they name in their wills.
Follow these links to find out more.
http://community.logos.com/forums/t/87.aspx?PageIndex=3; and
http://community.logos.com/forums/p/29832/220728.aspx#220728; and
http://blog.logos.com/archives/2005/12/heirloom_books.html