Magic Item Creation: Item that allows to shift planes

[Chevalier83]

Hi all,

I want to create an Item that allows me to shift my plane, foremost as an escape Item. Preferrably on Shoulder Slot, if that does matter.

I looked for similar items and found the following:

http://www.d20pfsrd.com/magic-items/wondrous-items/wondrous-items/r-z/robe- of-stars

This garment is typically black or dark blue and embroidered with small white or silver stars. The robe has three magical powers.

- It enables the wearer to travel physically to the Astral Plane, at will and on command as if using the plane shift spell. Once he has done so, the wearer can also return to his plane of origin on command, also as per the plane shift spell.
- This robe also grants its wearer a +1 luck bonus on all saving throws.
- Finally, the wearer can use up to six of the embroidered stars on the chest portion of the robe as +5 shuriken. The robe grants its wearer proficiency with such weapons. Each shuriken disappears after it is used. The stars are replenished once per month.

However, the shuriken are completely useless for me and the luck bonus is nice, but no must have. How would I price a shoulder slot item, that has the first ability (possibly also the second), but does not have the third one. Any suggestions?

[Ascalaphus]

How about the gold old Amulet of the Planes? It's been around since at least 2nd edition.

It should at least provide you a benchmark for cost/effectiveness of homebrew stuff.

[Chevalier83]

I need it as an escape item, so one specific plane is enough. For (planned) planar travels, I have spells. So, reslotting the robe of stars would be far more efficient for my cause than the amulet of planes. I just dislike the shuriken.