When I used cedar, I started with a dozen Hunter's grade, pre-made, from Rose City Archery. Then I worked my way up, bought matched bare shafts, and eventually bought them in 100's. I have access to a grain scale and surface table at work, so I could match them by weight and check straightness. They come spine tested, and grain on most were good. I would say 90% made great arrows, but there were some that were overly heavy or stiff, or wouldn't stay straight.
Prices went up, though, and the fun of making them eventually became work. I gave up on them, went to aluminum.