As all here have mentioned, maintenance is key. Be aware that many updates additions etc oftentimes go into these homes also, so a thorough home inspection as well as looking into permit histories can give a great idea if updates (if any) were performed properly. These homes were well built with strong materials back then, just be sure depending on financing, that the wiring was upgraded.
Best of luck, anything else needed feel free to contact me anytime.
And if they were well cared it would just need updating but most homes
in that era has character and uniqueness that you do not see in
the homes today.