How to proactively address piering & cracks w/ listing's basment?

[Marilyn Muckerman]

I have a listing at 310K that is in a most desirable area but the owners had some major repairs done to the basement to keep it from leaking 2-3 decades ago. We had the Contractor come out and review their work..which they claim ..has never failed.. and been in the business since 1941. Their warranty on this work expired after the first 10 years, so that is not helpful. 

Almost everyone that comes through the home makes some comment in their feedback, about the cracks in the basement floor which the contractor assured me are "normal" for the age of the house and pose no threat to anything. In fact, the contractor said this basement is probably the most leak proof and sound basement of any you would find in the whole neighborhood.

So how do I convey this to the buyer agents and their clients.. before they see an unfinished basement with piering + 2 cracks in the floor and just run away?

Thanks Marilyn