A bit late on this, but ends Wednsday.
Currently Target has Buy 2 Get 1 Free on Lego, the even better part of this deal is that City and Ninjago are currently 20% off (not sure when 20% off ends)..
These two deals stack and so if you buy 3 sets of the same price it works out at about 47% off. Great to get all the new 2014 city sets.
Additionally a few freinds sets are on sale and also stack, the Heartlake Juice Bar is down from $39.99 to $29.99 and so with the B2G1 it is half price at $20.
And lastly they also have some clearance items, LOTR, TLR and TMNT, these are at various discounts. As an example I picked up 3 x TMNT Hell raiser chases for $26.66 each.
Sorry for the long post.