Altatac via Walmart offers the Sabrent 50-watt 5-Port Desktop USB Charger
in White, model no. AX-U5PW, for $13.99
with free shipping
. That's the lowest total price we could find by $6 and the best price we've seen. It features up to 2.4 amps per port (10 amps max) and is compatible with most USB-charged devices.