I observe 360 at amazon since august 2. At this time, the two model were at 25 rank. Next, the sales have discreas . Before price drop 7 august, the two models were at rank 50. Yesterday, premium best rank was 4, and 9 for elite. Now elite is 11 (without new price drop), and premium is 1 (with a new price drop of 20 dollars). I expect, this new price drop is for destocking the premium without hdmi. Even if amazon is not a good indicator, we can expected, it gives element of what can change the next week and others later. For exemple, it seems to be evident that 360 sales are bigger now that begins of august. With that, you can see the sales rank of elite:
http://www.eproductwars.com/products/Xbox-360-Elite-System-Console-Includes-120GB-Hard-Drive-882224390118.cfm
With the other, the sales rank of premium:
http://www.eproductwars.com/products/Xbox-360-Console-Includes-20GB-Hard-Drive-882224035811.cfm
Actually, we can't see the stock at amazon, but yesterday, i have seen the stock, and they have sale more than 150 premium and more than 62 elite.
There was 464 premium in stock yesterday 8 august at 0 hour. and 314 at 20 h 40 .So, i expect with the new price drop of amazon, the 314 lastest will dispear fast.
For ps3, with this:
http://www.eproductwars.com/products/PlayStation-3-60GB-711719810001.cfm
and the stock next, i think they sales yesterday more than 73 units, what is inferior to 150, so I ask me the ("longueur" in french) of period of their rank. I think this was 24 hour, but with my numbers, it seems to be not the case. It will be interessant to know this "longueur".
Excuse my bad english.
I'm french, very french.