by THE SAW DOCTOR
The price of the blade is determined by the quality of the tungsten tip and the quality of the saw steel. If you see a blade for $100.00 and a similar saw blade for $200.00, the cheaper blade would have a medium grade tungsten tip and poor quality saw steel.
Where-as the more expensive blade would have a high quality tungsten tip and high quality saw steel, therefore the more expensive blade would last you longer as a less amount of tungsten has to be removed when sharpening. Having a higher quality of saw steel means the blade would be able to be re-tensioned if required.