Oversun
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The artifacts in the original game don't quite match this pricing policy; many are imbalanced in terms of price, and often in terms of their power level. For example, cheap and easily accessible artifacts that boost luck, morale, speed, and initiative, as well as providing comprehensive stats (like Forgotten Armor, which is overpriced).
I think, for the sake of balance, the cost of the original artifacts will need to be adjusted.