What can I get for:

Heavy Giant Slayers Hammer of Defense
Blunt Dmg: 19-35 (req. 9 Hammer Mastery)
Damage +14%
Energy -5
Lengthens Weakness Duration on Foe
Armor +5

What can I get for it? How much would it cost on the market or what would people be willing to trade for it?

Thanks.

i say .......... 20-30k
-5 energy really stinks on a warrior, especially a hammer one at that (pvp purposes)