They have an office in the same building I fly out of, and every once in a while I chat with some of their pilots. The guy who flies the 99 here gets 37k/year, for 6 nights of 4.5-6 hour flying. He said some of the other runs (particularly in Montana) pay a little better. I have no clue on the 1900.
Quick edit:
Rumor mill says they have a new run opening up somewhere in Montana. The guy I talked to asked if I wanted a recommendation, so it sounds as though they may be doing outside hiring.