Professor announces in class that she will be selling her skis at the end of the semester for $450. after class, arabella says she would like to buy the skis but can only afford to pay $250. professor frowns and mutters, "they're worth a lot more than that." but arabella looks so heartbroken that professor adds, "ok, what the heck. you can have them may 15." on that date arabella shows up with the cash, but professor explains that another student offered her the full $450 for the skis and she sold them. arabella purchases a nearly identical pair for $475 and sues professor. who wins and why?