Amazon Gold Box is running video game deals all day, including Gran Turismo 5: Prologue for $23.
http://www.amazon.com/gp/goldbox/
Up right now is Blazing Angels 2. I guess we'll see what the rest of the day holds.
From PS3Fanboy.com:
Amazon is having an All PS3 Gold Box event today. To kick things off, Gran Turismo 5 Prologue is on sale for $22.99 today only or while supplies last. According to ZappDeals, who is usually correct, the following selections will be the Lighting Deals for the rest of the day. The deal goes live at each corresponding time. We'll update this post throughout the day with the price and if there are any changes, so stay tuned:
6AM PST | 7AM MST | 8AM CST | 9AM EST: Blazing Angels 2: Secret Missions of WWII $23.99
10AM PST | 11AM MST | 12PM CST | 1PM EST: Logitech Driving Force GT Racing Wheel
12PM PST | 1PM MST | 2PM CST | 3PM EST: Ratchet & Clank Future: Tools of Destruction
2PM PST | 3PM MST | 4PM CST | 6PM EST: Uncharted: Drake's Fortune
4PM PST | 5PM MST | 6PM CST | 7PM EST: Devil May Cry 4
6PM PST | 7PM MST | 8PM CST | 9PM EST: Haze