Hi, Complicated mess in NYC, hope I can explain it in a clear and condensed manner. Wish me luck ! Real Estate Property with multiple "owners" estates.

The home is of significant value. Three siblings were listed owners of the property, a sale was nearly completed with one sibling remaining to sign the documents, who passed away prior, only weeks later a second sibling passed away. The first siblings estate has two executors, one agrees with the sale the other feels the price is below market value and seeked out a realtor who showed the house and in two days received a legitimate prequalified offer of 300k higher than the buyer from a year ago. The second siblings executor also passed about eight months later, and now the child is handling and apparently assuming full charge of attempting to reinstate the original sale, I thought it was null and void under the circumstances, with no obligation to that buyer. The third sibling, may have agreed to keep the original buyer as a viable sale. No status or information is being provided to the unagreeing executor, how to proceed, is there a court filing to protest and seek full disclosure?