Contacting the listing agent to view and or potentially purchase a property may be very limiting to you. The listing agent already represents the seller and will not be able to represent you without limitations. You don't save money, you are not properly represented and you limit the properties?
Why not select a Buyers agent you like and feel comfortable with that can represent your interests. Buyers agents are paid by the seller, don't cost you, most would argue that you may save thousands. Buyer agents don't care who the listing agents is, they are looking for the best house for you.
Arizona Homes for Sale by a Guy from Iowa