newegg offers the Cooler Master i500 500-watt ATX Power Supply, model no. RS500-ACAAB1-US, for $49.99. This $20 mail-in rebate drops it to $29.99. With free shipping, that's the lowest total price we could find for any 500-watt Cooler Master PSU by $14. This 80 PLUS BRONZE-certified PSU features six SATA connectors, two PCI-Express connectors, and more. Deal ends May 21.