There's no point in spending that much, unless you just want to. I got a little handheld biofeedback machine for $15 about 10 years ago, from Radio Shack and it still works great!
I use it to get into those really deep states of meditation. I'm always amazed at how simply scratching an itch or something, can bring you out of it a little bit, and it'll take 5-10 minutes again to get back to that really deep state.
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