Yeah bought a brand new, still in plastic AT&T G2 3 months ago on swappa for $400 total. Basically same price as a Nexus 5 with tax, but I preferred the larger battery + LG did release 4.4.2.
Should be even cheaper now with the G3 a month or two away.
Just make sure you feel comfortable with the seller (either due to review or amount of info provided).