I don't sell very often on eBay, only occasionally to purge a few things that I find myself just not using. So far I've been very lucky and every buyer always paid immediately after auction closed. Now I have this buyer who hasn't paid or communicated for 24 hours. I know it's not that long yet, but I am just wondering what's considered a reasonable time to wait before I send her a prodding email? I sent her an invoice already immediately after auctioned ended, and my terms did request buyer contact within 24 hours and payment within 7 days.