Strange things are afoot at Amazon.com.  It appears that the company has halted direct sales of the Nintendo 3DS due to some sort of nebulous product issue and is instead relying on its third-party vendors to fill the orders.  The exact error quote that Amazon is handing out is as follows:

While this item is available from other marketplace sellers on this page, it is not currently offered by Amazon.com because customers have told us there may be something wrong with our inventory of the item, the way we are shipping it, or the way it's described here. (Thanks for the tip!) We're working to fix the problem as quickly as possible.

The Internet is a little fatootsed over this. Has Amazon lost faith in the 3DS? Is Nintendo discontinuing the system? My uncle's sister's second cousin told me that Nintendo is getting out of the video game business, ahhhh! Relax, people.  The forumites at NeoGAF dug into this and apparently received an explanation from Amazon:

The reason why this is under a review: The flip-screen is loose when its opened, please inform them that Nintendo has confirmed as long as the upper screen locks into place, the unit is within Nintendo’s design specification. Customers can call 1-800-255-3700.

I've had my 3DS since launch and have never noticed this issue nor had a problem with any other technical aspect of the system.  Is there an issue with a bad batch of recent 3DSs?  Are the people who reported the issue being excessively rough with their 3DSs?  These portable systems are meant to be travel-friendly, but aren't supposed to be slammed around.  My guess is that this is either a temporary glitch in the matrix or a loud group of angry people enjoying an old fashioned online pile-on.  Now is not the time to panic.  I'm sure this will all end up as a tempest in a teapot when the smoke clears.