Corsair VX450W 450-Watt SATA-Ready Power Supply for $39.99 after a $30 rebate. Shipping depends on the location and is between $10 and $17. Note the user reviews have been very positive. It supports the ATX12-Volt v2.2 and is backwards compatible with ATX12-Volt 2.01 systems. It is also certified for 80 plus efficiency. Others usually have it for about $62.