Right now Gainesville is showing out of stock of the 1oz. That could be a game, when Apmex first release they only released 500 at a time, so we'll find out if they're actually out in their morning.
Apmex is showing 400 in stock, but they've only been releasing them 500 at a time, unless they changed that in the last few days. I really dislike their game.
I think 2 things are coming into play here: 1) dragon burnout is carrying over to the snake and 2) the snake is not the dragon and nobody killed it with series 1 snake like they did with series 1 dragon. I don't think you're going to see the same sense of urgency with the snake as you did with the dragon.
It also appears that the sellers in the US got the go ahead on selling what ever they could, or however many they could of the odd sizes, as both G-Ville and Apmex still offer both in big quantities, and I'm guessing they're both just listing so many, or X amount, for sale and when it runs down to Y amount, they up the quantity available. Just conjecture on my part, but there are 1800 1/2oz available on Apmex right now, if it gets to 200, I'd be willing to wager there will be 2000 available in a short amount of time.