I'm going to hide candy in the store so I can buy it when it's on sale
What do you hope to gain from doing this?
Well, I get to have candy for cheap.
I mean, who doesn't want cheap candy, but hiding it before a sale is wrong and cheats the business. They could end up going out of business if lots of people do things like this.
There's nothing wrong in doing so and I don't feel guilty!
It is wrong to cheat from a business because it essentially steals from them and hurts their profits. It could also cause legal problems or being denied your purchase if you get caught. It's better to just buy the candy you want when you can afford it.