Yesterday, we told you about Dell's $100 PS3 price cut, which was indicative of an industry-wide price drop on the horizon. Today, GameStop has followed suit. Trade in your old PS2, and get $100 off an 80GB PS3. Like we said yesterday; this is an indicator of retailers clearing out their inventory before the "official" price drop is handed down by Sony. Expect more retailers to follow suit over the coming weeks.