Need help identifying shell from West Aus

[diocrisseashells1000]

As a shell collector every specie that you find has a value, if you ask me ? i considered my collections as treasures. if your purpose is to sell them.... remember that lots of buyers are looking for a gem species, probably taken alive and with complete data. i have no idea how much worth the specie of suprasinum,but there are lots of seashells selling sites that you can browse on.

Happy shelling