Gold Composite Bow - 15% Always

Looking for a baseline estimate on:

Composite Bow of Marksmanship
Piercing Dmg: 15-28 (Requires 11 Marksmanship)
Damage +15%
Health Regeneration -1
Marksmanship +1 (15% chance while using skills)

7-10k

.

10-12k

Thanks!

Didn't think it'd be worth a whole lot considering the requirement and that it's a composite. Req 8 longbow or horn bow, I'd be a happy camper, even if I just kept it for my own personal use.