Two nights ago a friend sent me a text message saying he saw some Lego on sale at one of the Stop & Shop stores in Queens, NYC, marked as 50% off. He sent me a picture of the shelves and indeed there were some items that appeared marked down. Last night I went to check it out. I found a small selection of recent SW sets, and a couple recent and some older City sets, some of which had "50% off" markings on the shelf. However the item names on the shelf were confusing, and only by checking the UPC number could I determine what they were saying was on sale.
I can confirm that I was able to get 3x 9489 Endor Battle Pack for $6.49 & the last copy of 4432 Garbage Truck for $9.99, both of which work out to a proper $50% off. BUT, the tag for the battlepacks was not clear whether it was this one or the Elite Clone & Commando Droid BP, which they had many more of, and the tag for 4432's UPC number said "Prisoner Transport" on it? They also had 4436 Forest Police Patrol Car, 7741 City Police Helicopter and a 7942 City Off-Road Fire Rescue (silver fire helmet , i believe all for $4.99 but the tag said Police Helicopter and had the UPC for the fire truck? (Forest Patrol had the right number). Finally they had 9491 Geonosian Cannon, with a tag at the shelf with 9490 Droid Escape, listing the item as "Imperial" and price as $12.49 for half off of $24.99, the UPC matched the Geonosian Cannon. Again not sure if Droid Escape also qualifies.
If you have a S&S in your area it's probably worth checking out. These were located in a seasonal section, directly behind the new beer section (hadn't been to this one since I moved last year, their beer display is 6x bigger now, yay!!)