common ingridients are too cheap to relay on price. 25k for dc hammer? 100 residue from it, 2k per cheap mod below 90%. Gems? same upto 2-3k. Essence? let it be 10x more, 20k per mod.
Well, as for failures, 5x tries is max reasonable. So, for imbue such ring is like 300-500k for resources only. Skilled crafter have less failures for his profit.
So, 500k-1m is fair?