Also, I feel many employers want to see who you are, and what your skill set truly is, before they talk money. I applied for a job this winter with a company. Ad said above industry pay. Never gave a price. I took a day off from work, went and met the owner, and we talked for a long time about trees, equipment, and the industry. It became very apparent to me that I had many more skills and experience and certification than he had. When it came time to talk about money. He wanted to offer me 17 dollars an hour. 12 years ago I made 22 dollars an hour straight out of college. Wish he had put that his above industry pay was 17 dollars in his ad, I wouldn't of waisted my time.
Also, sometimes a really skilled climber and arborist needs a job. So they are willing to work for less. If a company hiring can catch that vibe, they might get a good guy for cheap. Could be the other way around too sometimes.