Help price this weapon enhancement?

[comrade raoul]

I think this would be a neater ability for armor than for weapons, personally. And I think it would be worth a +3 market price bonus (for armor, remember, which is cheaper than for weapons) for Fast Healing 1; this means that you'd more or less be confident of beginning each encounter at full hit points. Perhaps a "greater" +5 version would provide Fast Healing 3.