The American arm of Amazon has temporarily blocked the sale of the Nintendo 3DS internally, stating that following consumer complaints, the item is now under review.
Visiting the website will see users greeted with a message that reads: "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."
Nintendo will be hoping to correct this as soon as possible - the Nintendo 3DS has been struggling with sales enough already, without problems such as this.