Even though most people aren't aware of this, Hotels.com and Expedia.com are the same company. It only makes sense that an error at one would be duplicated by the other. Anyway, as a person who's dealt with Expedia/Hotels.com for a long time (I work for a major hotel company) I would NOT trust them to honor that $97 rate once they discover the error. They'll say you should have known it was the wrong rate since it's the same as the rate they are quoting for a standard room.