I have been having my router bits and table saw blades sharpened this past year. The place I go is principally for industry shops with pallets of blades arriving daily. The table saw blade sharpening is done on a Vollmer(?) Robotic CNC station. Sharpening is from $8 to $18 depending on number of teeth for 10" blades. Blades sound quieter after sharpening and cut awesome.
I get excellent service out of a local sharpener and boy do they work well when they come back.