Price of magic items

[zegc-ben]

I am a newbie and I was thinking of doing some intensive trade of magic item as middle age Vanheim but I have no idea of the prices I should ask.

I think the answer should depend several factor mostly :
importance of a single item (low for generic thug items, relatively hight for early game god SC gear, very hight for path bosters whicht enlock a path, ...)
ability for the buyer nation to make the item on his own

I woulb be expecially interested by the price of a dwarven hammer before turn 10.