The executors have only a duty to realise the property at a proper price at the time. They decide, on professional advice . The estate agent ought to tell them of all offers, even some joker's ludicrous one. It's up to them whether they, having been advised, decide to accept. They are never going to be held liable if they do that in good faith. That there's a chain, or the buyer may need finance etc are factors in weighing up whether to hold on or not, but it is better to act promptly; there are limits on how long executors can delay in winding up an estate, undue dilly-dallying is not to be encouraged! In the instant case I'm wondering why they wouldn't', if they're minded not to, accept the full price offer. They are not closed to offers and selling to someone else in the meantime if the buyer can't complete or shows no sign of being able to do so, or changes their mind etc