The only thing that I can think of, assuming that you're buying a guitar that you've chosen in a shop (so not online...), 'Are you happy with it, walking out of the door..?'. There's not that much to fuss about with a new guitar that feels good enough to buy. New strings don't need changing, nor frets polished, if it's already good in your hands. If you feel that it needs a set-up for you, after trying it out, maybe it's not 'The One'..? I'd spend more time listening to how it sounds, both acoustically and through an amp of your choosing, the comfort, the feeling that it projects to you. The most adjustment would be getting a comfortable strap sorted out, I'd say. Make sure that a suitable case is part of the deal, too, both for travelling (and taking it home..!) and for keeping it safe at home when not being played. If it feels right, ask what strings are already on it, and either note that, or buy a set for changing when it's due. It's true that I don't buy new, generally, but I worked for several years in a music shop, as a technician, and sold guitars, both acoustic and electric, with very little thought, nor need, for set-ups straight from the shop. At worst, an electro-acoustic might need a new battery, so get one fitted before taking possession. No need to over-think it, I'd say. Hope this helps.
Douglas