Amazon offers the Samsung Active Shutter 3D Glasses, model no. SSG-2100AB,
for the in-cart price of $39.99
with free shipping
. (Best Buy
charges the same, but charges sales tax in more locations.) That's the lowest price we could find by $12, although they were $2 less in January (since expired). These battery-powered glasses are compatible with most (2010 model) 3D-capable Samsung HD televisions, Blu-ray players, and more.
Update: Best Buy now has them for in-store pickup only.