Detail, which would include wax, is very different than Ceramic Coat, which requires paint prep and much more labor-intensive application. It takes a while to Ceramic Coat, and poor work will be visible for a very, very long time.
Around here, the dealer offered to do ceramic coat for $1,200 on a brand new car.
The detail guy I use charges $900 for ceramic coat. I have seen prices from $900 - $1,200 for ceramic.
But I would expect closer to $200 for a full interior exterior wash and wax.
Which is why I generally do it all my self. The detail guy I use did both Mercedes when we had family in town for a funeral. The house was full, I didn’t have time, and I think it was about $500 for both cars, with tip, and the cars looked awesome when he was done.
I got to be with my family during a difficult time instead of in the driveway with a bucket and buffer.