I am moving this thread out of the "Suggestions" forum into a more appropriate one.
To answer your question... why not just call your vet and ask? Each clinic sets their own fees. If you need a fecal done, let them know that. Some vets might require an office visit to see the animal (and consequently charge an exam fee) and others may not.
In my area the vet visit alone is $35-$50, that's just the cost of walking through the door. After that, it depends on what your having done, a fecal exam may run $10-$15.
If it's just an overall visit to check the snakes health and fecal, you might be looking at $50-$75, but again depends on where you live, the vet and what you need done.
As Paul Said,"why not just call your vet and ask?.......but if that is a problem......try here http://vca.know-where.com/vca/
They offer $30 off to new clients. Check the map for your State and location.