Alter Aeon Online Help

Keywords are:  'necromancer soulstone soulmarket smarket market'

Usage:
smarket list           - show current prices and availability
smarket value <stone>  - estimate value of a given soulstone
smarket sell <stone>   - try to sell a soulstone
smarket buy <color>    - try to buy a soulstone

The soulstone market is an automated store that can be used to buy
or sell soulstones for gold.  You can use the market from anywhere
on the game, to either sell extra stones or buy new ones in a pinch.

The game automatically calculates a price and matches buyers and
sellers, and takes a percentage cut on every sale.  Prices and
quantity update every few minutes.

Note that because buyers and sellers are matched, soulstones may or
may not be available depending on demand.  If you are unable to buy
or sell the desired stone, either try a different color, or try
again later.