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Newegg has the ZyXEL PLA4225KIT 4-Port 500 Mbps Powerline Gigabit Switch Kit for $159 - $60 off with coupon code EMCNENJ82 = $99 with free shipping. Features plug and play connections for up to four devices, QoS enhanced media streaming, power saving mode and includes 1-Port adapter up to 500Mbps.
$99
you wont get the full or even close to the full 500 Mbbps even if you plug both modules into the same outlet.
while this is better then nothing, wired is still the best.
Yeah, the better of the powerline adapters seem to have about 200Mb/s real world throughput, or lower depending on relative location of the outlets they're plugged into, but 200Mb/s isn't bad at all for many purposes. That frees up wireless spectrum, eliminates the chance of wifi security being hacked (though you may want/need wifi anyway for a laptop/etc) and is plenty fast enough for web surfing or accessing a fileserver if it's light use, small files or low bandwidth required like playing a typical video.
Besides which, it is never clear on these gadgets what they mean by the claimed data rate. Obviously they are not transporting data end to end at 1Gbit. Maybe they are sending bits that fast under some correction protocol that has 500% overhead.... ??
^ They have to be converting the data with a bridge chip on each end to a serial signal since GbE requires 4 bidirection pairs of wires while a power line is only one pair of directional wires, unless they're doing TX and RX on different frequencies.
It sorta makes sense, 1/4th the wires and not twisted pairs mean less than 1/4th the potential of true GbE bandwidth.