OK, I'm odd. I kept an Excel spreadsheet.
I quit on September 6th,
vaping since then (with cheats, accounted for in the spreadsheet). I've spent $1,162 on supplies, whereas I would have spent $3,052 on cigarettes. I broke even on October 26th, and I've saved around $1,900.
That break-even date keeps moving outward every time I
buy something new, but I'd have to
buy a whole heck of a lot to put myself back in the red again!