I am very interested in learning more about the accuracy and pricing of the D-RTK GNSS option.   I can't seem to find it.   Am i missing something?

Thanks for your interest in M600 D-RTK GNSS.
With the D-RTK GNSS, the M600 can reach cm accuracy of positioning in the air: Hovering accuracy increases to within 2cm horizontally and 3cm vertically with D-RTK.
About the quotation of M600, please refer to our official online store: http://store.dji.com/product/matrice-600?from=menu_products
For any sales issue, please talk to our sales representatives.