Circular saw blade sharpening machine - GIF

[Frank S]

That is where many in the been counting department have it wrong. especially those who cannot differentiate between bottom dollar cost versus longevity of service.
they simply believe that change out times remain the same for top of the line or bottom of the line where they fail is in not accounting for the frequency of having to change out the cheap stuff. or the reduced quality of product at the near end of life blades.
And no most times it is not worth re sharpening the cheap blades. the hardness is not there the coatings once worn off leave the blades to create higher friction and even warpege.