aopirose, I couldn't agree with you more. When I see a badge on ebay, I email our headquarters, along with those who I know buy them, and headquarters forwards the email to any potential buyers. It hasn't worked wonders, but when a badge goes for $621, what can you do?
Another idea, call your fellow sisters, pool your cash together and bid. Then, send the pin to nationals, get reimbursed, and now you've saved a pin!
Best of luck