PC on Flesh Skinned Vampiric Hornbow

Vampiric Hornbow (gold/flesh skin)
Piercing Dmg: 15-28(Requires 9 Marksmanship)
Damage +15%
Armor -10 (while attacking)
Life stealing: 5
Health regeneration -1

Thank you in advance

Also, is there any value at all in a gold 15/-5 Half Moon?

ADDED: It's a req.10

10-15k on the first bow

depends on the req for the half moon. i got a 15/-10 r11 and was told it'd be around 5-7k

Thanks.
I really thought the first one would be a little more.
Anyone else have an opinion?