I received my order confirmation right after I ordered yesterday from Ebay, Paypal, and my CC. You should of received your order confirmation pretty much right away automatically. Check Junk email folder, sometimes it goes in there. They are listing any of the low price stamp listings as "out of stock". My seller still has stock, yet his listing got listed that way. He's working on getting his listings back on, he's been with Ebay for 8 years now with a 100% feedback, so it's a little frustrating for him given everything else he has to contend with. Also check that your CC charges aren't just "pending", it can stay there until eBay Commerce Inc. actually processes the order or Amazon shipping an item.
Hopefully we both get our stamps a month or two from now.