Trading follows the old age adage of buying low and selling high. It is not strictly limited to buying low, but also procuring something at a low price and selling it at a higher price.

Direct Trading

You can directly trade with players in stations. Although to do so you are reqired to have bought an Omega Clone.

MarketPlace

There is also a very fleshed out marketplace system in the game, where one can buy and sell products in stations.
Alpha clones have to fly to a trading hub to be able to buy and sell their goods, while omega clones can trade from any station.

Buy Orders

To place a buy order you have to open the Trade menu, search the Item you want to buy and choose from which location at which price you want to buy. You can then choose how that item gets to you. Either by shipping, for which you have to pay an amount of ISK, or by flying there yourself and picking it up.

Sell Orders

To place a sell order you have to open your inventory. The item(s) in question need to be in the Item Hangar of the Station. Then you click on the item and on sell, choose the amount to sell and at which price per item you want to sell. It’s always a good idea to look at which prices your item is sold and sell it at a reasonable price. The money, minus a broker fee, will be transfered to your account as soon as the goods are sold.

List of ITC Market Hubs

station_name	solar_system	region_id	security_status	empires
Amarr VIII (Oris) - Moon 4 - Expert Distribution Retail Center	Amarr	Domain	1	Amarr Empire
Maspah V - Moon 6 - DED Assembly Plant	Maspah	Derelik	0.8	Amarr Empire
Nibainkier VII - Ministry of Internal Order Assembly Plant	Nibainkier	Kor-Azor	0.7	Amarr Empire
Itrin V - Moon 2 - Amarr Trade Registry Information Center	Itrin	Genesis	0.4	Amarr Empire
Asghed VI - Moon 5 - Imperial Shipment Storage	Asghed	Devoid	0.4	Amarr Empire
Kamela V - 24th Imperial Crusade Logistic Support	Kamela	The Bleak Lands	0.4	Amarr Empire
UHKL-N V - Moon 1 - Blood Raiders Testing Facilities	UHKL-N	Delve	0	Amarr Empire
9RQ-L8 VII - Moon 11 - True Creations Shipyard	9RQ-L8	Stain	-0.1	Amarr Empire
Jita IV - Moon 4 - Caldari Navy Assembly Plant	Jita	The Forge	0.9	Caldari State
Tash-Murkon Prime II - Moon 1 - Kaalakiota Corporation Factory	Tash-Murkon Prime	Tash-Murkon	0.8	Caldari State
Alikara VI - Moon 14 - Echelon Entertainment Development Studio	Alikara	The Citadel	0.7	Caldari State
Onnamon IV - State Protectorate Logistic Support	Onnamon	Black Rise	0.6	Caldari State
Kador Prime IX - Moon 2 - Kaalakiota Corporation Factory	Kador Prime	Kador	0.6	Caldari State
Piekura VII - Spacelane Patrol Assembly Plant	Piekura	Lonetrek	0.5	Caldari State
H-PA29 IV - Moon 2 - Guristas Assembly Plant	H-PA29	Venal	-0.2	Caldari State
Auvergne V - Moon 5 - Federal Intelligence Office Assembly Plant	Auvergne	Sinq Laison	0.9	Gallente Federation
Renyn X - Moon 14 - Chemal Tech Factory	Renyn	Essence	0.9	Gallente Federation
Alentene VII - Moon 1 - Astral Mining Inc. Mineral Reserve	Alentene	Verge Vendor	0.9	Gallente Federation
Bereye VII - Moon 1 - Material Acquisition Mineral Reserve	Bereye	Everyshore	0.7	Gallente Federation
Heluene X - Material Acquisition Refinery	Heluene	Solitude	0.2	Gallente Federation
Ostingele VI - Moon 4 - Federal Freight Storage	Ostingele	Placid	0.2	Gallente Federation
4C-B7X V - Moon 7 - Chemal Tech Factory	4C-B7X	Outer Ring	0	Gallente Federation
Serpentis Prime VI - Moon 1 - Serpentis Inquest Biotech Research Center	Serpentis Prime	Fountain	-0.1	Gallente Federation
Pator VII (Kulheim) - Moon 1 - Republic Fleet Testing Facilities	Pator	Heimatar	1	Minmatar Republic
Nakugard VII - Moon 2 - Krusual Tribe Bureau	Nakugard	Metropolis	0.5	Minmatar Republic
Istodard IX - Moon 5 - Republic Fleet Assembly Plant	Istodard	Molden Heath	0.3	Minmatar Republic
E02-IK VIII - Moon 1 - Thukker Mix Factory	E02-IK	Great Wildlands	-0.1	Minmatar Republic
G-G78S XI - Moon 3 - Dominations Assembly Plant	G-G78S	Curse	-0.2	Minmatar Republic
BMNV-P XI - Moon 11 - Intaki Space Police Assembly Plant	BMNV-P	Syndicate	-0.2	ORE