To be honest, I haven't had much experience with creating soundtracks, but I'd like to do more of it. I can use any sort of instrumentation you'd prefer; I have an extensive collection of professionally recorded instruments, and I also have an extensive selection of synths.
I charge $100 per 4-6 minute track. If you would like me to make a soundtrack for you, head over to my contact page and we can discuss the type of sound and style you want.
The following demo is a very short soundtrack I did for a friend's Harry Potter fan fiction film trailer: