Dell Inspiron Notebook $574
That can happen for a variety of reasons, but usually it's because the product either sold out or increased in price.
The lowest price on any new laptop. More than enough for most: Intel Celeron 2.3ghz, 256mb, 20gb HD, 24x CDRW/DVD. Windows XP. $574 after rebate & $25 off coupon. Update: won't ship til after xmas.