The one thing I’d be scared of would be cigarette or pipe or cigar smoke. Smokers don’t realize that odor gets even in the walls and sometimes it takes two coats of stain blocker to get it out completely. A home sale for a home 2 doors from us fell through for that simple reason. Seems the owner had some of her Father’s furniture removed to give to charity and it stirred up the old man’s cigar smoke, especially after it rained for a few days. She had to replace all the carpet after that.

Roaches or bedbugs would concern me but I even spray cardboard boxes when I bring them home from the store.