RuminDange said:
Any idea how to calculate the cost of the +2 Enhancment Bonus to Caster Checks against spell resistance?
We came to "an agreement" anyway.
The bonus to spell resistance is probably equal to a 2nd level Clr spell with a duration of 10 min per level. That is, it's probably worth 2*3*2000*1.5 = 18,000gp. I've seen elsewhere on these boards estimates of the magic item "price of feats" to be from 10,000gp to 20,000gp. Pick yer poison.
The Robe price in the DMG doesn't follow the rules given later in the DMG. So it's all just arm-waving anyway. The DMG market price is 75,000gp.
Here's the price based on the other rules in the DMG, as if we had made Robe of the Archmagi from scratch:
- +5 armor bonus to AC. (5*5*1000gp = 25,000gp)
- SR 18. [(18-12)*10,000gp = 60,000gp]
- +4 resistance to saves (4*4*1000gp=16,000)
- +2 CL vs SR (18,000gp)
Since this is a slotted item, all costs but the most expensive are multiplied by 1.5. (DMG p 282)
- +5 armor bonus to AC. (25,000gp * 1.5 = 37,500gp)
- SR 18. (60,000gp)
- +4 resistance to saves (16,000 * 1.5 = 24,000gp)
- +2 CL vs SR (18,000gp * 1.5 = 27,000gp)
Subtotal: 148,500gp * 70% (alignment cut) = 103,950gp
Again, the Robe of the Archmagi actually cost 75,000gp (DMG).
Dunno what to do with the descrepancy....it's kinda like you get the SR for half price. If we assume that's what happened (1/2 price for SR...but only in this special item), then we can't apply that to a new item, right? If so, increasing the Resistance bonus from +4 to +5 (which is why we started this excerise in the first place) will cost:
.70[(25,000gp*1.5) - (16,000gp*1.5)]= 9,450 gp.
I could post more math if you'd like. Do others have a different breakdown of the Robe of the Archmagi?
What a pain.
