I have roughly 20sq of Celadon clay tiles coming off of a homeowners house that was installed horribly wrong. Switching roof systems and need these out of the way. Tiles are only 20 yrs old and look fantastic still. Let me know your interest and what your standard procedures are for shipping and delivery and any other details.
I would check to see if there is a local slate and tile salvage company in your area. The one near me comes to your site loads and pallatizes them. They don’t pay anywhere near resale but they do all of the grunt work and logistics.