Newegg offers the Corsair VS500 500-watt ATX 80 Plus Power Supply, model no. CP-9020118-NA, for $39.99. This $20 mail-in rebate drops it to $19.99. With $2.99 for shipping, that's the lowest total price we could find by $23. It features two PCI-Express connectors, seven SATA connectors, and a 120mm fan. Deal ends March 20.