What is your goals? It is okay to change, but you should have an idea of your goals. Just because something is cheap doesn't mean it is a good deal, if it doesn't fit with your goals. Don't just buy things because they are cheap, buy them because you expect to use them. Keep them because you expect to use them again.
In my case selling things is not in my goals. Like you I have noticed a lot of things in my shop that I'm not using, I don't want to have to think about if I will use them again so they sit there collecting rust. I don't have enough to time make chips as it is without taking time to properly store or get rid of things that I'm not using now. I have a todo list 3000 years long, in the unlikely event I live that long I may start selling things I'm not using, but for now I have better things to do.