Brandon- It all boils down to this: - You identified a problem. - You did (or at least should have, and I assume you did) recommend that a qualified drainage contractor be consulted to evaluate/recommend corrections/perform corrections as he deemed appropriate while warranting his work to the buyer. At this point, like the Lone Ranger, your work here is done, and you can ride off into the sunset. If you choose to be further involved in the process ( can you say re-inspection?) you may become helplessly sucked into the seller/contractor/buyer/Realtor tar baby. Sometimes we do it as a service to our customers. When we do, sometimes is costs us time and frustrations we should not have to endure. Your level of involvement is, however, your choice. I know, I've been there countless times. Often I provide a level of service above and beyond the call, but not always. As they say, there are none so blind as he who will not see. You can spend a lot of time trying to lead blind men to the light.