As first seen on Toys N Bricks, Toys R Us stores in the US are offering a 'buy 2, get 1 free' offer on all LEGO sets (excluding Star Wars and tubs). I personally went to my local TRU to do a little army building. The $11.99 sets like the Prince of Persia Desert Attack or the Toy Story Army Men on Patrol are always good for army building, while aiming for a little diversity.
The potential savings are 33% on each item, but only if you buy sets of equal value.
One other interesting item of note, the Toy Story poly bag set Alien Spaceship was on sale for $3.99. If you were looking to stock up on Little Green Men, then you could get one free for every two you buy!
The sale goes through next Saturday (9/25). Check TRU.com or call your local store for details.
(Via Toys N Bricks)