In reply to rob braver.

Rolex has been producing Submariner watches with black dials and bezels since the early 1950s, which means that for the buyers that simply want the classic all-black Submariner, they can opt for any number of different models. If the new-generation movements and updated case proportions are not all that important to them, they can simply opt for the date-displaying Submariner from the previous generation and have a watch that is nearly the same as the current production model (at least from an aesthetic standpoint).
However, Rolex has only ever produced two Submariner watches with green dials and bezels - the ref. 16610LV "Kermit" and the current ref. 126610LV - and if the buyer wants one with a ceramic bezel, that further limits down the available options to a single reference. For the buyer that specifically wants a Rolex Submariner with a black dial and green ceramic bezel, the current ref. 126610LV is the only option, which means that there is a larger number of buyers that are all looking for the exact same watch - and one that has only been in production for about half a year at this point, so there is still a relatively small number of examples in existence. Since there really is no alternative for this configuration, the overall demand for the green bezel options is significantly higher, which results in a higher price on the open market compared to its black bezel sibling.