Hi Mark, obviously the cost to purchase and fit must be reasonably substantial, otherwise you wouldn't bring it up. I must admit I am staggered at the prices quoted by Benz Boy. So I'd guess about $90.00. Incidentally, talking of fitting new blades to Gleaming Beauty or any other 116/107 for that matter, I have yet to find an easy way to fit them. I seem to have to bend open the little lugs that retain the blades and the stainless strip and then close them up again with a pair of pliers. Am I doing it correctly ? It just seems to be all cumbersome. So I am grateful for any hint or direction. Regards. Styria