[Chief Rum]

Yup, what molson and Celeval said. It's possible that more than the price alone was discussed in the "handshake agreement" discussion, and if so, Buyer A should abide by that as well or risk the deal being out. Anything not discussed, IMO, comes under a reasonable expectation qualifier. For instance, the "out by three days" example give, that is patently unreasonable. The deal is voidable over something like that. If the little details, though, fit with the normal expectations for such a deal, I would think mauboy should still honor the deal, so long as Buyer A meets his agreed upon obligations.