I had some LD's left after the divorce in 1997 and the used record store that sold them then was taking no new movies. None.
It has been in decline for quite a while. It is good as an odity, and nothing more. A few purists will pay big bucks for an original, but Laser Rot will probably take it's toll in the long run.
These things aren't 78's...
You haven't been to ebay lately have you?