The following is a current price list for items in the guild bank. They are approximately half the “going rate” on the Auction House. Any new items will be added to the list as necessary. The prices of old items will be adjusted based on the economy.
Ps: I know there are a lot of items not up yet, just give me a bit of time.

? = Worth undecided.

Gear:
Boots of the Terrestrial Guardian = ?
Helm of the Lightning Halls = 20g.
Rusted-Link Spiked Gauntlets = ?
Bone-Framed Bracers = ?
Chain of Latent Energies= 400g.
Zom's Crackling Bulwark = ?
Mantle of the Extensive Mind = 400g.

Weapons:
Librarian's Paper Cutter = 60g.

Mining Ores/Bars etc.:
Titanium Bar = 7.5g per bar.
Titanium Ore = 3g per piece.
Saronite Bar = 1.5g per piece.
Eternal Fire = 13g.
Eternal Air = 2g.
Eternal Shadow = 3.5g.
Eternal Water = 3g.

Gems:
Solid Sky Sapphire = 16g
Dazzling Forest Emerald = 2.5g
Stormy Sky Sapphire = 25g
Sparkling Sky Sapphire= 5g
Powerful Earthsiege Diamond = 10g.
Empyrean Sapphire = ?
Dragon's Eye = 70g
Any green (“Common”) gems: 2g

Inscription:
Book of Glyph Mastery = 60g

Patterns:
Pattern: Living Leggings = ?
Pattern: Footpads of Silence = ?
Pattern: Spellslinger's Slippers = 1000g (?)

Cloths:
Frostweave Cloth 1 stack = 2.5g

Enchanting mats:
Runed Orb = 500g.
Frozen Orb = 25g.
Abyss Crystal = 30g.
Primal Nether = 2g.
Nether Vortex = 7g.
Greater Cosmic Essence = 9g

Bags:
Pack of Endless Pockets = 10g.

Item enhancements:
Jormungar Leg Armor = 20g.
Eternal Belt Buckle = 25g.

Leathers:
Arctic Fur = 40g.