Meh, the BCNM20 drops are kinda worthless now by comparison to what you can get with your seals from the other BCNMs. I suppose if you did Shooting Fish solo and got the mannequin body, it might be worth it, but I haven't seen what it sells for at all lately.
I think you'd be better off saving the seals for better battles. It is possible for 3 SMN to trio Under Observation with 2X Ramuh and 1X Avatar of the day/elemental weakness of the mobs. Just have the orb user Astral Flow the mobs while the other two use thunderspark.
75SMNK / 48THF / 42RDM / 37DNC / 37WAR / 37NIN
Punching mobs in the face on Bismarck.
Black Belt obtained 9/16/09 at 5:10AM!