In the past, we've slammed stuff from the dollar store that wasn't worth your buck but, as you might expect, I have a lot of things from the dollar store in my home. Many of them have been around for two to four years and are still in use. Each one of these only cost me a buck or two at the dollar store but would have cost as much as three times more at a department store. Here's an example of what I mean.
In my kitchen -
The four-sided metal cheese grater I own is one of the first items I ever bought in a dollar store and is at least four years old. The same day I bought it, I saw the exact same grater in a major department store for three times the price.