Rest assured that your potential "buyer" will have an inspector check out the home. But if you'd like to know in advance, you can have the home inspected yourself, so that you know what to expect.
If a problem is suspected, responsible sellers, and agents should set their sites on correcting it before listing it. As a buyer, wouldn't this be appreciated.
This is similar to septic compliance testing. It is not required in many communities but most buyers are going to request a compliance test. If there are problems, whether expensive or not, they can be addressed before listing. If it passes, we have a report to show the buyer and one less worry for the seller when negotiating.
My sellers also offer a one year seller paid warranty. The home sells quickly, for more money and no surprises!
In my area cost for warranty and inspection is around $500.
You say its Stucco, but is it? There were various "stucco" looking products used in this period with varying degrees of success. Some I've seen applied are literally Styrofoam nailed on then shaped and sprayed. If moisture gets behind the Styrofoam and is can create a number of problems.
Having this inspected first is a double edged sword. Once you know of a defect you must report it and will likely need to fix it. On the positive side, your homeowners may be able to make a claim against their homeownerâ€™s policy. On the other side, what you don't know is the responsibility of the buyer to investigate.
I personally fall on the side of finding out and resolving it, in part because the longer the problem exists the more damage may be done. If the siding was well done and there are no problems, you've eliminated one issue that may keep you or your sellers up at night.