Newegg.com has the Corsair Builder Series CX430 V2 430W ATX12V v2.3 80 PLUS Certified Active PFC Power Supply for a good price.

Item has a rating of 4/5 from 85 reviews

Pricegrabber Price : $58.28 Shipped

1. Newegg Price : $44.99 Shipped
2. Use coupon code EMCKAKA24 to get 10% off ( Exp : 9/15/11 )
3. Rebate Price : -$20.00 ( Exp : 9/19/11 )
Final Price : $20.49 Shipped After Rebate