PC on Gold Sundering Amber Longbow of Fortitude

Hey, was wondering if anybody can put a price on this -

Sundering Amber Longbow of Fortitude (GOLD)
Damage 15 - 28 Req 10
15^50
Armour Penetration 20/19
Hp +30

Thanks In Advance.

i hope u didnt put the upgrades urself. 15-20k