http://www.airbnb.com/help/topic/traveling#On top of the booking price of a listing, any deposit, tax, or cleaning fee should be listed in the description or details section of the listing -- so you can view them there. You may also message the host directly to ask about any additional fees. You should also remember that Airbnb charges a service fee of 6-12% which will be made clear on the checkout page
For comparison: http://www.ticketmaster.com/h/help.html