I'm not sure about the fluid capacity on a RTV but everything should have been changed at 50 hrs. It should have had the hyd fluid, gear oil, engine oil and all the filters as well. You figure all that plus probably $85 per hr labor and it adds up quick. It would be much cheaper to do it yourself if you have the time and place to work on it.
On my L 3000 it costs about $500 just for fluid and filters and me doing the work. My M 9000 cost over $1100.