I don't know if this is dishonest or not:
I don't normally shop at large retail stores but this past Christmas I decided that I wanted to get a tree. I went to Target and found the one I wanted but they had none left. Three Target's later I found one that was in stock so I bought it, lights, ornaments, everything.
Two days later I had to go back for another string of lights and noticed that the trees and Christmas stuff was now on 'Clearance' and 30% off. I went to customer service and asked if I could get a price adjustment since I just bought the tree two days ago, they said no we can't do that on clearance items.
So I went back to the Christmas department with my receipt and found everything I bought before, the tree, lights, whole deal. Went to the checkout and got everything with the 30% off plus whatever $10 off deal they were doing as compensation for their credit card breach.
After I paid I pushed the cart 20 feet to customer service and returned all the new stuff I bought with the old receipt to the same customer service representative. Saved about $100.