Treno AuctionThese are the Items you will be able to obtain:
Below the Key Items you should make the effort to buy.
After purchasing certain Key Items from the Treno Auction, talk to people in the area around the Café Carta. Some nobles will see that you have items they desire, and will offer Gil for them.
Important itemsDark matter
Can be used in the battle (do 9999 damage to enemies), and can be used to learn Summon Odin.
Give it to the old man in Daguerreo Library, he will reward you with Steiner's third best weapon, Excalibur. The Magical Fingertip will not be avaliable until you have bought Une's Mirror, Griffon's Heart, Rat Tail, Doga's Artifact and sold them to people of Treno.