Price checking on a 3 Bows and 3 Swords (For future reference)

I'm still a little new to the game so it would definitely help me out to know where these items stand to help me price items in the future. Very much appreciated in advance. (P.S. If you can tell me why they are priced certain ways that would be extremely helpful :c) )

Bows:

1. Sundering Flatbow of Fortitude
15-28 Req. 9
Damage +13%^50
Armor Penetration +10%/10%
Health +29

2. Poisonous Halfmoon of Fortitude
15-28 Req. 9
Damage +13% in a Stance
Lengthens Poison Duration on Foes by 33%
Health +29

3. Composite Bow of Warding
15-28 Req. 10
Damage 14%^50
Armor +7 vs. Elemental attacks

Swords:

1. Zealous Longsword of Swordsmanship
Damage 15-22 Req. 12
Damage +15%^50
Energy Gain on Hit: 1
Energy Regeneration - 1
Swordsmanship +1/15%

2. Furious Flamberge of Fortitude
Damage 15-22 Req. 8
Damage +14%^50
Double Adrenaline on Hit 9%
Health +27

3. Longsword of Shelter
Damage 15-22 Req. 12
Damage +14% Enchanted
Armor +7 vs. Physical Attacks