PC on Max Damage Sundering Half-Moon of Warding

I need a price check on the following item:

Gold Sundering Half-Moon of Warding
Dmg. 15-28
Req. 11 Marksmanship
Dmg. +15% while Health is above 50%
Armor Penetration +20% (19% chance)
Armor +7 (vs. elemental attacks)


Thanks!

10k~..