Got one of those 3 weeks ago via cowboom for same price. Cowboom is a Best buy affiliate.
Those who are not aware the Sony BDP-BX57 is the identical player to the "retail" BDP-S570 with the addition of an HDMI cable. It was featured mostly at warehouse stores I believe.
If you see another deal on those it is a great BR player: fast and nice upgrading DVD player. Also has great access to online content with it's own wi-fi and even has 1gb of built in storage for BR Live.