Many here have had a pro fit and I have yet to hear someone say it was not worth while. I have not done it myself and maybe I should, I have been taking the long road on my Tarmac.
There is a correlation between bike fit and saddle comfort. If you are too stretched out you will find yourself getting worked to the front of the saddle causing eventual pain, if you are too upright you will not share enough weight between the arms and the seat and you will develop saddle pain. However if your old sassle provided comfort then you are probably in a good position and all you need is a saddle that fits your rear end. I have ben working with a Selle-Anatomica for about a year, not a bad saddle but I am also working through some of the other fit issues so it's too early to say whether it's a wonder saddle or not. It does have a lot of adjustment capability and seems to cradle the sit bones well.

If I had to do it over again I would get a new saddle from a shop that carries a wide variety and will allow me to take them out on loan until I find one that works, for me it takes a good 3 hour ride to decide.

As far as the shop recommending a fit at $200 - there is a lot of profit margin in this for them, there is no material cost, they may have a fit rig to amortize but usually there only expense is the labor of the fitter. You must judge what their motivation is vs. what your need is and determine the value to you. What I have done recently is have my wife take pictures of me while I am on the bike so I can see how my fit appears and I can work on things that obviously seem off. Lastly, if you go it alone you will have less ability to swap parts as you try different things, at $200 the bike shop should allow you to swap parts and make continuous adjustments until they get it right - I would expect it to be an effective life time fit insurance policy.

Good luck - this can be frustrating.