mwave offers the Logisys PS480D2 480-watt ATX Power Supply
with free shipping
. That's the lowest total price we could find by $5, excluding the deal below. Features include two SATA connectors, four Molex connectors, and more. Note that this PSU does not have any PCI-Express connectors.
A close price: Directron has this power supply for $11.99 with about $6 for shipping.