Saint Mary's Art Gallery advertised a sale of art works on their website. Anyone wanting to buy something was instructed to email the gallery director. Ping emailed the gallery director saying she wanted to buy a particular painting of the McNally Building. The gallery director emailed her back telling her she could pick up and pay for the painting the next day. When Ping went to the gallery the next day the gallery director told her they had sold the painting to someone else.

But Ping thinks she has a contract. Does she? Why/why not?