No. There is no obligation unless you accepted a deposit from Person A.Also, is it legal to sell an item to someone else after I promised it the first inquirer online? For instance, Person A is the first to express and interest in an item for sale online. You set a date for them to come and look, however they don't show up. I email them and they have some lame excuse why they didn't show. This happens twice more, but they assure me they will be there tomorrow at 10 am. Meanwhile I get a mesage from Person B who says they can come right away since they live 10 minutes away. Am I still obligated to hold it for Person A?