Garden Stones, Rock Garden, As Much As You Like [Pick-up Only]

This garden stone was passed down from the previous generation. It is said to be valuable, but I don't know the details. I'm having trouble disposing of it and am willing to give it away to anyone who wants it.
I used it in my garden flower bed. (Reference photos attached) I was satisfied with it as a way to do some gardening without getting my shoes dirty.

I do not have heavy machinery, so pickup is required. I will assist with manual labor. If you wish, I can also wash it with a pressure washer (Karcher).
The work area is spacious enough for heavy machinery and large trucks. Located in southwestern Hyogo Prefecture.