I will caution you, price does not in any way directly correlate to quality of work. I have hired people who undercharge (at least in relation to the quality of their work) for several reasons: because they don't know what the market will bear; they enjoy the work and don't care; they are just starting out and need referrals; they are a one-man-shop and still make more than they would as someone else's employee.

In fact- I've found that often times, price inversely correlates with quality of work. Perhaps it may reverse again once you reach a certain inflection point where you're paying for a lot of 'white glove' service and someone who is willing to take abuse from very demanding clients.