Roofer told me they made sellers agent aware roof needs replacing

[Clint Wade]

We bought a house a month and a half ago and knew the roof needed some attention after the inspection. The seller had someone come out and assessed the damage saying it needed $1500 worth of repairs. Being the first house we’ve ever purchased we didn’t think/know to have our own roofing company to give us an estimate. I contacted the company who done the estimate for the seller and one of the first things he told me was that he told the sellers agent it definitely needed replacing. No where in the estimate report does it say it needed replacing and neither did they disclose that throughout the purchase process. I’m curious if this is something that should have been told to us, or if we are at fault for not having someone come out and look at it on our behalf. We closed on June 1st and we're in South Carolina.