People are more likely to pay for what they perceive is a quality product.
And, for me at least, I would want to be able to promise consistency to my customers. If I were going to send you brass that costs $3-10 each, I would want to be sure it would come back the same way every time.
I would not bother to send you 6.5 CM brass, for instance, since it’s something where it is common enough and cheap enough that I would prefer to buy another 200 rounds new. Unless the annealing price was very cheap and very consistent.
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“Keep on keepin’ on…”