As long as you don't power them up! Power cords, capacitors are the most likely to fail components in old electronics. A professional overhaul the large electrolytic capacitors and small paper capacitors are almost always replaced. Especially if they have been setting around unpowered. It is called "recapping". Sometimes to reproduce the appearance of authentic era type gear, they will use the old paper caps, like a shell over new caps. More like a facade in an old western movie!