I normally sell much Materials that I don't need every day so often
Overall Prices
2-Star Common Material: 50 Bid Price, 250 Buyout Price (250 on Trade)
3-Star Common Material: 100 Bid Price, 500 Buyout Price (500 on Trade
4-Star Uncommon Material: 200 Bid Price, 750 Buyout Price (750 on Trade)
5-Star Rare Material: 500 Bid Price, 1,500 Buyout Price (1,500 on Trade)
2-Star Battle Sprite Food: 250 Bid Price, 750 Buyout Price (750 on Trade)
3-Star Battle Sprite Food: 850 Bid Price, 1,250 Buyout Price (1,250 on Trade)
4-Star Battle Sprite Food: 1,350 Bid Price, 1,750 Buyout Price (1,750 on Trade
5-Star Battle Sprite Food: 1,850 Bid Price, 3,000 Buyout Price (3,000 or more on Trade)
Unbound Orb of Alchemy: Variety Price on Auction House
Unbound Accessory: Depends on Prices by Players
Unbound Weapon, Armor: Variety Price on Auction House

Other of my Usable stuff will be determined on how much they'll plan to sell at that point