Pretium affectionis
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
An imaginary value put upon a thing by the fancy of the owner, and growing out of his attachment for the specific article, its associations, his sentiment for the donor, etc.
Bell; The H. F. Dimock, 77 Fed. 233, 23 C. C. A. 123.