Animation Music

I have just finished contacting Kris Wilson on deviantART to ask if it would be ok to use some of his music on my showreel when I get one together and how much he would charge to create a piece of music for my current project. He mentioned some time ago that he would be willing to create music for people so I thought I should give it a go.

"Hello there Kris,
I'll get straight to the point.I was wondering if I could get your permission to use Colico on my animation showreel? If you agree I'd ensure you got credit on the end.
While I'm on the topic of music and animation I would also like to ask about your services as a musician. How much would you charge to create a piece of music for an animation lasting roughly 1 minute 30 seconds long?
Thanks and regards,
Alistair"