From brief searches I've done on the net, it doesn't appear to be a hugely popular name? And your bet is potentially selling this to someone with this name...that's the problem. I think it won't be easy, hence likely little value...
Others are welcome to share their view. Just my little opinion
Is this a brandable play on combining mist and natural? Really up to you, you need someone to start a business with that exact name but might be worth waiting.