What does everyone use for ballast?

[Anonymous]

I use the ground rubber, in 2 different colors available from Scenic Express...Tim

[jlrocks]

I am getting to the point where I am ready to start laying ballast on my track. Checked out the local hobby store and found it is expensive stuff. Is there somewhere that it can be purchased in quantity or do you make your own? If so out of what material? Thanks, JLROCKS.