If you find that some of the paper is no longer usable for silver printing itstill is of use. As mentioned above, some may be desirable for lith printers. Some Carbon transfer printers (I am one) fix it out and use it for single transfer final support. Cliveh says it may be good for lumen prints. There are most likely other alt-photo process printers who would be glad to take it off your hands should you find you have no use for it.

Dan