As a matter of principle, I refuse to patronize scum-sucking anti-gun PayPal, eBay, or Half.com. May they choke to death slowly and painfully, and rot in hell forever.
None of their corporate entities will realize one single penny in income from me, or any transaction that I am involved in.
If more firearms aficionados took this stance, maybe, just maybe, they would change their stance. As it is, they figure that they can dictate their anti-constitutional position to us and we'll baaa like sheep, and fold under.
The way I see it, you're either part of the problem, or part of the solution.