I am trying to get my head around what makes a weapon valuable. I have screens showing various weapons I have picked up and as far as I can gather they are not worth that much. I don't want to bug the PC gurus with it since they seem so busy and stressed, so I figured I would see what everyone else thinks. Here are the pics:-
Now the bone staff is quite high req but has a bonus poison reduction mod, halves all spells casting 10% is max with 2 nice max mods, I thought it should be worth something but apparently it aint.

The earth staff :- max, max mods, halves recharge all spells, better req....still worth nothing

Does a staff have to have recharge AND casting time mods to be worth anything or is it purely about the skin?
The Long Sword....only purple



The Fellblade max


Lastly a nice little spatha, max



Please help, I would really like to understand these things better. All points of view will be appreciated.