This never ceases to make me angry. $112 (Australian dollars) for an ebook version of Cassell's Latin Dictionary. This is the 1968 edition of a book first published in 1959, itself updating a dictionary first published in 1854.
So the publisher has added precisely nothing to this edition, apart from standard searchability and of course DRM restrictions.
(Fortunately I got a hard copy for $9 at my uni's alumni book sale.)