Underocean Trading
There are currently 5 tradeposts open under the ocean. You can fly almost directly above them and type FLY DROP. Make sure you have an Aquoderm's lung (to breathe water) and a Kraken's swim bladder (hold it to move uu and dd 10 rooms at a time). When you fly drop, dd to the tradepost; it will appear to be on top of a pillar.
The only freight type that can travel underwater is the giant snail, purchasable at the underocean posts for 2 million gold. This guide will not attempt to cover the basics of moving around in the underocean; see the game help files for a pretty good explanation of that.
Basic Valuing Aliases
/alias {valvryce} {value straedust snail;value fraedust snail;value serpentblood snail;value sharkblood snail;value krakenblood snail}{} /alias {valmal} {value sharkteeth snail;value sulfur snail;value stingraytails snail;value seasnakevenom snail}{} /alias {valsol} {value sirensong snail;value mermaidhair snail;value aquamarines snail;value starfish snail}{} /alias {valjakob} {value seadragoneggs snail;value serpenteggs snail;value krakeneggs snail;value aquodermeggs snail}{} /alias {valleaf} {value coral snail;value basalt snail;value ventrock snail;value magicrocks snail}{} /alias {valuo} {valjakob;valvryce;valmal;valsol;valleaf}{}
Tradeposts, Tradegoods, Coordinates and Fly Directions
Jakob's Mountain Monument Trading X 0950 Y 0050 Depth 209 fly n 95 w 5 (by pship) valjakob seadragoneggs serpenteggs krakeneggs aquodermeggs
Vryce's Necromancer Trading Shop X 0100 Y 0150 Depth 189 fly n 85 w 90 (northwest) valvryce straedust fraedust serpentblood sharkblood krakenblood
Malevolent Trading X 0111 Y 1700 Depth 208 fly s 70 w 89 (southwest) valmal sharkteeth sulfur stingraytails seasnakevenom
Soleil's Sunny Shop of Trade X 1900 Y 1900 Depth 209 fly s 90 e 90 (southeast) valsol sirensong mermaidhair aquamarines starfish
Giant Leaf Trading Market X 1900 Y 0100 Depth 209 fly n 90 e 90 (by trellor) valleaf coral basalt ventrock magicrocks