If you want the absolute best for the job, in a very specific skill-set that has only existed for two years, then you'd best be willing to pay considerably, or

If you want the absolute best for the job, in a very specific skill-set that has only existed for two years, then you'd best be willing to pay considerably, or you're going to have to be willing to train people with the proper fundamental skills in that specific toolset. A lot of companies are unwilling to do either of those. Offering $110k for a ReactJS developer? Better be willing to hire someone with a good understanding of software development patterns and a solid history of shipping code with the understanding that some on-the-job training will be required. Won't settle for anything but the best? Then set the salary to somewhere it would pull the level of talent you need. And if you're not willing to do that, then consider how you can get by with the first candidate.