Images leaked on web show that the system will be available for $99 starting on April 5 likely to coincide with April NPD and the DSi launch.
After launching in late 2000, Sony's PS2 looks like it is finally about to dip below the $100 threshold in the United States. Images leaked on to the internet from retail computers suggest that the PS2 will drop to $99.99 on April 5. The date is the start of the first full week in Sony's new fiscal year, the start of NPD's tracking period for April, and the debut for the DSi which Sony will want to offset. At $130, the $30 price drop represents nearly a 25% price drop for the PS2 and may foreshadow a PS3 price cut later in the fiscal year ending March 2010.
Some more proof of this
http://www.neogaf.com/forum/showthread.php?t=356814