I ran into a similar situation... in town there are 3 Walmarts...... one was decimated quickly when 50% kicked in, the second was was low but still had good selection at the 50%, but was cleaned out quickly when the 75% kicked in (I had bought about 50% of what I wanted). The third still had good selection at the 75% and allowed me to fill the rest of my wants (and a few extra). I went back a week later and there was still some stuff left at 90% off but very little that I was interested in and most was damaged.
Larry