For me, composition is a hobby rather than a full-time job. This means that (1) if you're under time pressure, I'm probably not a great fit for your project, (2) I'm fairly selective about which projects I take on, and (3) I can be flexible on pricing as long as the budget allows me to pay my collaborators (instrumentalists, sound engineers, etc.) fairly. As a ballpark, my typical rate is $500-700 per minute of completed music, which includes post-production, live instruments, etc.