We all hope that once we go through the trouble of selecting a perfect tool and finding the offer that our budget can support, all that is left to do is take it home.
And sometimes, it surely is like that, but with chainsaws, not really.
Chainsaws require a lot of maintenance, primarily If you regularly use them for demanding tasks. The blades can lose their sharpness, and if you don't have a proper tool to fix it, you need to pay the professional to do it.
That is why buying a chainsaw sharpener could be a good investment, as they can extend the life of the cutting blades and your chainsaw generally, keeping it sharp and active.