You must speak with your Agents Broker right away. Also contact a local real estate Attorney. Your Agent does not appear to be doing their job. While the Seller does not have to fix anything on the home, with an exception to strapping the water heater and installing smoke and carbon dioxide detectors, they must complete all disclosures in writing. If this is a For Sale By Owner it is possible they do not know this. Your Agent should be working with the Seller to make sure these documents are completed properly. The fact that you have not received a copy of the Transfer Disclosure Statement is not acceptable. This document must be completed by the Seller and turned over to you. Furthermore, you must sign and initial this document to show that you have in-fact received a copy. I also find it hard to believe that the Seller did not know about these issues that other home owners have been dealing with. They live in the same community and the Association would have made them known to all homeowners in the community since it appears to be a wide spread problem. The Seller's failure to disclose this information should allow for a new 3 day period to cancel the escrow and get your deposit back. This new info may be used to encourage the Seller to at the very least help with the cost to make the repairs rather than loose you as a Buyer and start the process over.