Listing early lets you use the marketing time productively while the court process runs in parallel, and legal fees for the estate side, typically $800 to $1,500 above straightforward closing costs, are worth confirming with the estate's lawyer up front so a buyer's lawyer sees a clear timeline before advising their client to firm up an offer.
The executor named in the will, or an administrator appointed by the court if there is no will, is the only person with legal authority to sign a listing agreement and, later, an accepted offer, so confirm that authority is in place before any paperwork goes out.
A lawyer handling the estate can tell you exactly where the probate timeline stands. Get your hand-reviewed valuation from Joel Dyck.