No, you would have sold it for a hundred bucks. And if you didn’t then you would have sold for two hundred. Or for three hundred…
Not having bought it that day is just one step of the ladder you didn’t climb. You would still need to not sell it every day since.
TURN server doesn’t need to be free, you just need everyone to be able to access it.
The product I work on in my 9to5 would be perfect for your use case from the technical side of things but sadly the commercial side is a completely different story that makes it not even worth recommending.