Be glad they lowered the price on Scroll of Instant Warp and Instant Reraise by half, before the 11/16 patch they used to cost 1500 CP and 1000 CP respectively.
It's also very handy for those missions or quests that take you way out to B.F.E. or deep into a monster infested dungeon. If you aren't a BLM, I highly recommend it.
Note though: it works just like the Warp spell and takes you back to your Home Point, so if you happened to save at an outpost along the way, you'll end up there, so be careful!
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Samus taught us that a girl doesn't need brains to be successful. Brains are giant, evil and vulnerable to missiles.