I think alot of the times, sites put up later than expected dates so they don't have to deal with as many "when are you getting more" calls and emails.
I was reading an article the other day that referenced the ammount of primers CCI makes in a day and it was a huge number.
They might be pricey for a little while, I don't know about running dry. I have enough stuff stashed away to not worry about it for a while.
Trying to set a bench up now would suck though.