PC on two bows, a hammer and a mesmer staff

I've been around in GW for pretty long, but when it gets to telling how much I should charge for things, I'm pretty lost. Any help is appreciated.

1) [Gold] Zealous Shadow Bow of Enchanting
Stats:
- Piercing dmg. 15-28 (req. 9 marksmanship)
- Damage +15% (while enchanted)
- Energy gain on hit: 1
- Energy regeneration: -1
- Enchantments last 18% longer

2) [Gold] Recurve Bow of Fortitude
Stats:
- Piercing dmg. 15-28 (req. 8 marksmanship)
- Damage +14% (while in a stance)
- Health +26

3) [Gold] Sundering War Hammer of Enchanting
Stats:
- Blunt dmg. 19-35 (req. 9 hammer mastery)
- Damage +20% (while health is below 50%)
- Armor penetration +10 (chance: 8%)
- Enchantments last 17% longer

4) [Gold] Hale Jeweled Staff of Shelter
Stats:
- Energy +10
- Chaos dmg. 11-22 (req. 9 illusion magic)
- Quick recovery from weakness
- Improves skill recharge (chance: 9%)
- Health +29
- Armor +6 (vs. physical attacks)

If you want to make an offer on any of these items, please leave your IGN in your post, and I'll contact you as soon as possible.

Thanks for your help!

1) 25k
2) 25k
3) merchant
4)

4. 10-20k not sure

agrees with earlier posts

Thanks a lot for all the input.