I second the idea of the non-exclusive/exclusive price tiers. I would also suggest relating pieces with one another when they might make sense as a suite (i.e.

I second the idea of the non-exclusive/exclusive price tiers. I would also suggest relating pieces with one another when they might make sense as a suite (i.e. same genere, thematically similar, techno vs. orchestral, etc.) And I also second the "nicely done!"