Hi Joe,
Definitely they have values. If those stones were taken underneath the ground, as hidden object, then there must be a purpose. You need to determine through assay what kind of material they are made. BTW, the smaller one looks like a replica of a fruit, a 'makopa'...it seems.
If you will sell it, first you need to provide the buyers with identification of that stone and the amount you wish to sell it.
Regards,
Angel