[Stuart]

Somewhere between 1,000 and 50,000.

Really, it's difficult to say. It depends on the quality of the work, the paint and materials used, your location and a million other things.

The fact you already have it in primer may be a problem for some shops - they don't know for sure what brand/type primer you used and they have to paint it with compatible products, plus they can't tell what's underneath that primer so they can't guarantee the work will turn out. Also, the car may look straight and ready for the paint booth to you, but an experienced body man may see a lot of work that still needs to be done.