Excuse the ignorance but what's a shop-out?
A 'shop-out' definations can vary, but essentially it is a clean up, re-rubber, re-globe of a pinball machine and fix any non functioning parts.
Re costs of this - very hard to define. It all depends on what you have to begin with.
For me, when I rebuild / resto a pinball it gets completely stripped as well, all playfield nut / bolts tumbled and hand polished, all new coil sleeves and coil diodes. New flipper kits are a must.
If you have a look in the restoration sections, you can see some of the great work of members on this site - including Strangeways, JohnWartJr, DDSToys... and the level of attention to detail which gets done.
I recently completed a Funhouse - which was rough to begin with. Well over 60 hours went into this game. If there is nothing mechanically wrong with your game (Superman I'm guessing) rubbers, globes, flipper kit, coil sleeves, new balls, playfield polish would be a minimum. I've never done a rebuild on an Atari so I don't know the availability of these parts.....
