Prices for Skiller Grand Charms

Hi guys, I have troubles estimating prices for Skiller Grand Charms.
Can you help me with the folowing?
1. +1 Cold Skills (Sorc)
2. +1 Combat Skills (barb), +13% Gold
3. +1 Summoning skills (druid), +28 Life
4. +1 Elemental Skills (druid), +6 poision in 3 sec
5. +1 Defensive Auras (Pala)
6. +1 Passive and Magic Skills (Amazon)

Scanned LOADS of Skiller-Offers over the last two weeks. Doesnt mean I used all of them or did play each builds, but from what I saw:

plain cold: 1,5Ist
barb combat +gf:

Pul/

Pul+
summon druid, even with life:

Pul, maybe

Um
ele + psn:

Pul/

Um
def pala:

Lem or for free, sorry!
passive magic ama:

Lem or for free, sorry again!