Unfortunatly if its a 135 job the pay MIGHT be considerably lower, considering your friend's low time. I know some crappy operators start there 35 FO's at $22K. Realisticly, he should shoot for about $30K + full benefits, with reasonably good time to upgrade (12-24 months). If its a legitamate corporate job (91) the starting pay might be considerably better (around $55K), but upgrade might be considerably slower.
I just posted this on the Hawker pay threat, it might be relavant here
"There have been a lot of questions about pay in the last few days, one thing to remember in the corporate/charter world there is no union, these numbers are strictly average. What one Hawker crew makes might be completely different than another one. What you make and earn is completely up to you.
For instance, I can guarantee you that I would be able to find a Hawker copilot, who would gladly accept a salary of $15,000, wash the airplane, and get my dry cleaning, wash my car, etc. (not that I would ever consider doing this, its just an example). On the other hand, there are a bunch of us corporate pilots that have to "hide" the salary surveys. Using the Hawker example again, I have a very good friend that flies a 700 he's making $130K, his SIC is making $70,000, and they also do some 135 work."