Gun Shop Inspection Etiquette...

[Zonaken]

Newbie question...

Considering purchasing one of two WWII era Lugers; one with vet bring-back papers, one without, from a local shop.
I've purchased a few modern firearms from him and have reasonable trust in him, although I have never bought a C&R from him. (I mean no disrespect in not purchasing through this forum, just need a tactile, in-hand, connection to the purchase.)

Both pistols are in the $1500+ range.
I'd like to support my local dealer and am willing to pay a reasonable amount to support his bricks & mortar.

My question is (albeit subjective):
What is considered "acceptable" to ask of an in-store, countertop inspection of a Luger, to observe part #'s, overall finish condition, wear patterns, rust/pitting, bore condition, etc? (i.e. to what level of stripping the gun down at the store, should I expect or ask for?)

I will be asking for an Inspection Period, but being a new Luger person, I'm not yet skilled at the breakdown & reassembly myself.

Thanks in advance, for your info and patience.
Zk