That depends on the price of fish/sushi on your server. If the price of a stack of Black sole from the vendor is considerably less then the price in the AH then it's possible. However, if this is an easily caught fish it might be overpriced on the vendor. Best bet? Shop around, or take up fishing.
From Mhaura to Selbina several more things are sold on the boat from NPC named Rajmonda , she sells the same stuff as Lokhong except she had these following items also :
Yellow Globe : 143 gil Zafmlug Bass : 303 gil
Also some of the prices were different on the way to Selbina , like these items here :
Pamtam Kelp - 24 gil Bastore Sardine - 35 gil Shall Shell - 3,312 gil Nosteau Herring - 752 gil Gold Lobster - 2,188 gil Bluetail - 1,854 gil Noble Lady - 3,136 gil Silver Shark - 3,280 gil Bastore Bream - 9,666 gil Greedie - 60 gil
At the time I had gone on the ship Windurst was in first place . I went on the ship again when Bastok was in first and went in both directions Selbina to Mhaura and then Mhaura to Selbina and the Yellow Globes were not for sale .
These are items Lokhong sells on trip to Mhaura from Selbina :
Lugworm - 9 gil Sabiki Rig - 2394 gil Minnow - 270 gil Sinking Minnow - 691 gil Tarutaru Fishing Rod - 4,077 gil Pamtam Kelp - 60 gil Bastore Sardine - 43 gil Shall Shell - 3,564 gil Nosteau Herring - 792 gil Tiger Cod - 509 gil Gold Lobster - 2,292 gil Bluetail - 1,350 gil Noble Lady - 3,752 gil Silver Shark - 3,000 gil Bastore Bream - 10,746 gil Greedie - 34 gil Quus - 60 gil Bhefhel Marlin - 2,052 gil Bladefish - 5,320 gil
At the time Windurst was in first and I have lots of fame so prices may vary .
I got on the ship in Mhaura and headed to Selbina, but I could not find this NPC anywhere on the ship!
I know there are 2 ships that make the route, but are there different NPC's on the ships? How do you know if you're getting on the right one before you take off on the boat?
Edit: I found this NPC on the ship from Selbina to Mhaura. Perhaps the ship originated in Mhaura, but I was getting on it from Selbina. Also, this NPC was selling a lot more than the poster above me states. It may have to do with who is in control of the region at that time.
ok there are 4 different shop mercants, the difference is where the boats start ie: youre going from mhaura -> selbina, theres 2 shop npcs, but if you go on the same ship but selbina -> mhaura, there will be different merchants
And, the two different sets of merchants have two different buy/sell prices