As one of its daily deals, Newegg offers the SeaSonic S12II ATX12V V2.3 520-watt Power Supply Unit for $49.99. Redeem this $10 mail-in rebate to cut it to $39.99. With free shipping, that's the lowest total price we could find by $26. It's 80 PLUS Bronze-certified and features two PCI-Express connectors and six SATA connectors. Deal ends today.