Based on previous "how do I compute what I'm worth as a consultant" discussions on forums like this, it seems to me that $125/week as a contractor is equivalent to roughly $100K/year as a salaried employee. That's not unreasonable considering (a) Cocoa developers are presumably in scarcer supply than, say, Java developers, and (b) the price is for "developers I know and trust", i.e., not folks who have just emerged from a "Teach Yourself To Be A Dummy In 21 Days" programming class.