My own personal philosophy of selling items through any website, is that it's a great bonus/benifit of a site like this. I already spent the money for whatever it is I'm selling, and being able to re-sell that item is just a clever way to keep future projects funded. I'm not using that money to pay for my mortgage. So any money I get towards selling something like bullets/brass/etc just goes into what I call my "gun fund".
I hold my own integrity above the small dollar value of bullets/brass/etc. If I ever sell anything, I will always refund somebody their money for any reason, even if it's lost in the mail.
Even larger ticket items like scopes/rifles, although I will do my best to be ultra careful, if something goes wrong I'll always take the item back and provide a refund for any reason.
I'm sure some people will disagree with me, this is just my own personal philosophy.