"Black Market" is pretty mediocre. There are a couple of very poor choices, both character-wise and plot-wise, and it suffers from the curse of most of the "in the fleet" episodes (in that the producers seemed compelled to introduce action, no matter what the content of the episode was).
But it's not nearly as bad as "The Woman King," which is moronic, condescendingly moralizing, lazy, and completes a certain character's descent into the position of being the unquestionably worst character in the show.