Agreed with what Dan Said completely…. and to add some of my own thoughts…
One of the primary obligations of any realtor involved on any side of a transaction is do disclose any and all material facts regarding the property. It does not matter how they came to know about the facts, whether by visual inspection, whether by working with the property manager that did updates to the home prior to it being listed etc…
So yes it seems that if you feel there are material facts that you are just now finding out about, that would have been important for you to know during disclosure then you should act. With that said, the burden of proof is on you to find out about these material facts to make sure they do exist. Sounds like finding out who the property manager was and trying to dig up what work was done on the home is the way to go but it will require legwork. I agree about talking to an attorney as well. However you will need to open your wallet.
Going back to what Dan was saying anyone that is going to work through the listing agent should take note that without an advocate for you, then you are on your own. Ed perhaps it didn’t occur to you then but maybe asking that listing agent point blank for a detailed list of any and all repairs that were done to the home since he obtained the listing may have been a good idea. Even asking him to put in writing that none were done or that he checked with the property management company and none were done may have really helped you. Also when extensive work is done, usually a good physical inspector will be able to point that out as well. So… perhaps the quality of your inspection may have been lacking as well.
