It takes time to build a collector base. Remember that the gold and silver eagles have a 20 year head start on the buffalos. I was able to buy one on Monday before the prices took off. It may not meet your definition of a "great level", but prices are up $400 in 48 hours. I'll take it!
I wouldn't throw in the towel just yet. All it would take is 45 returns or cancellations for it to still be the key. That was a large number of last day orders, so it is possible that they don't have coins to fill them all.