depends on what you buy.
I have some 30 odd suppliers I source material from(from composites, to plastics, to metals). I shop and purchase based on who sells what cheaper at that current time as the market fluctuates drastically in certain areas, for certain materials.
Most of my billet and titanium I buy from Manth Brownell in syracuse, steel stock and sheet from Nolan Enterprizes in that area as well. I shop M.S. when I need something quick and in a pinch but have never been done wrong by them at all.