PC on 3 Gold Bow plz

Hi can someone give me a pc on what these three bows are worth, i am almost clueless on value on bows : , just wanted to know if i got a good deal or did i got ripped off cuz i brought them. (if anyone is curious i got #1 for 8k, #2 for 9k, and #3 for 12k)

1.)Gold
Sundering Eternal Bow of Defense
max dmg ( req. 8 marks)
13^50%
Armor +4
Armor penetration +10% (chance 6%)

2.) Gold
Fiery Shadow Bow of Marksmanship
Fire dmg 15-28 (req 9 marks.)
14^50%
Marksmansip +1 (20% chance while using skills)

3.) Gold
Sundering Half Moon of Fortitude
max dmg (req. 9 marks.)
14^50%
Armor penetration +10% (chance: 9%)
Health +23

Thanks in advance and half a nice day. NOTE: just edit number 3 sry forgot to put its inhert dmg modifier sry guys. so can someone give me a new pc now. and thanks for your time.

#3 salvage for sunder string

#3 = Salvage for 9/10 sundering

~Herb

shadow bow 50k imo... not sure cuz i think that shadow bow is not really that wanted

eternal 10-15k
shadow 30k
halfmoon 30-40k