Board Fab

[cajone5]

Hi,
I am helping out with a project and have a friend laying out a board for it.  He says that he will be sending me "Gerber Files" for the layout.  I need to get about 30-50 boards fabricated and I was wondering if someone could point me to somewhere that would do this quantity at a reasonable price.  Please let me know if you have any recommendations.
Thanks so much for your help! 
Cliff