Hi Scoffey86, it all depends on what is involved....if you take your machine to a mower shop and ask to have it sharpened, they have to remove the cylinder reel and soleplate (complete with the bedknife still attached) and send it to the engineering workshop (freight) and re-install and adjust the clearances on its return. They can charge up to $80.00 an hour for labour alone.
If you remove the reel and soleplate yourself and take them to the engineer....you can save heaps. The engineer I use charges me $70-$80 for the reel and bedknife.
