We have a player that would like permanent Unseen Servant enchanted to one of his items. I guess the first question would be is that even possible per RAW?
Second would be how much would it cost?
The rulebook says [spell level x caster level x 2,000gp], since it's "permanent" we don't need anything more than a 1st level casting of it, so cost would be [1 x 1 x 2,000 = 2,000gp]. There is some subtext offering multipliers and divisors depending on if the spell is usually timed in rounds, minutes, or days. Unseen Servant is timed in hours which isn't listed.
My confusion comes in when you compare 2,000gp for permanent to the costs of just having a number of charges per day, which breaks out like this:
CL1 = each cast lasts 1 hour
1 charge/day = 360 gp
2 charges/day = 720 gp
3 charges/day = 1,080 gp
4 charges/day = 1,440 gp
5 charges/day = 1,800 gp
CL2 = each cast lasts 2 hours
1 charge/day = 720 gp
2 charges/day = 1440 gp
3 charges/day = 2160 gp
4 charges/day = 2880 gp
5 charges/day = 3,600 gp
CL3 = each cast lasts 3 hours
1 charge/day = 1,080 gp
2 charges/day = 2,160 gp
3 charges/day = 3,240 gp
4 charges/day = 4,320 gp
5 charges/day = 5,400 gp
CL4 = each cast lasts 4 hours
1 charge/day = 1,440 gp
2 charges/day = 2,880 gp
3 charges/day = 4,320 gp
4 charges/day = 5,760 gp
5 charges/day = 7,200 gp
CL5 = each cast lasts 5 hours
1 charge/day = 1,800 gp
2 charges/day = 3,600 gp
3 charges/day = 5,400 gp
4 charges/day = 7,200 gp
5 charges/day = 9,000 gp
With these numbers, why would you ever purchase this item with charges of Unseen Servant as opposed to having it permanent? Am I missing something?
EDIT: may have answered my own question, looks like the spells given in the Permanency description are the only spells allowed without GM approval.