some of the larger chain like store will give a QUICK once over at times, BUT keep in mind, some stores have dummys behind the counters too
a GOOD gun smith is the safest route and they will charge due to they will invest there time and MAKE sure its safe, not just say UP< GO ahead and shoot it!
they will find any flaws or NONE and tell you
ALSO< on a different note
IF you also got ammo, that too can be a question to think about as IF was reloaded and certain calibers were form fired for just ONE gun he has, and all
they might NOT function in other SAME caliber rifles or guns
I am guessing if this person was into guns, they were most likely into reloading too
AMMO can be dangerous too!
I would also suggest you learn how to STORE guns to keep them from being ruined by moisture and handling them
be a shame to have good quality valuable guns get ruined just cause you didn;t know any better!
some guns can be worth a LOT of money, even one's that don't look like much, or are rusty or??
so, having a GOOD smith look over and tell you what you have and value's maybe, might be a worth while investment for you!