They were marking down Millennium Falcon as I got there. I think I just got lucky.
Actually, I went to a closer Walmart first, that had the same prices everyone else was mentioning. There was a tag for the $89 Helm's Deep, but it was out. So I used the Walmart site, and found a store with limited stock.
Drove there, thinking the limited stock might have meant things were clearanced, and found the $75 Helm's Deep set there. They had 4 or 5 on shelves, so I got 2. They had at least 3 Millennium Falcons, and I bought one. They still had everything I bought when I left.
I did also see the Moria set for I think $49. But it wasn't a big enough markdown, and I had already bought it at full price. Weathertop was not clearanced at either Walmarts I went to, but I already had 3 sets, and parted 2 out to make 4 Nazguls free.