Amazon offers its Amazon Prime members 2 pairs of LG AG-F210 3D Cinema Glasses
with free shipping
. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $5.58.) That's the lowest total price we could find by $3. These glasses work with LG LW5600, LW5700 and LW6500 series 3D TVs. Sets contain either two black pairs or one orange pair and one white pair, but color selection is random.
Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months. (Note that currently there's a waitlist for Amazon Mom.)