I’d say this is incredibly cheap. That’s $3,650 per decade. So if you’re say 70 and you want to go back to your first day of high school (15yo for the sake of argument), that’s a hair over $20k to basically live your entire life over.
Of course the question is, do you de-age as you go back? Or does the 70yo stay a 70yo just 55 years ago? If you don’t de-age, then the whole thing is much less useful- it’s basically an opportunity to undo one or two mistakes.