No, Ebay turned communist a few years back. They won't sell casings. There doesn't seem to be any rhyme or reason to it, they will sell scopes, lead for casting, bullet molds, but not bullets or shot. Perhaps it depends on how much money they can make off it.

I used to buy a lot of shotgun hulls to reload on ebay. They aren't real high on my list because they caved to anti-gunners. I did see a guy selling lead BB shot on there. He disguised it a little, said it was lead round balls 'to be melted to make sinkers'.

Anyhow, you can sell your brass on gunbroker.com

There is currently some 30-378 brass for sale for about .50 per round with six days left.