You can/may choose to accept Disclosed Dual Agency where the listing agent represents both parties. This is practiced quite often. We recommend, however, that you enlist the services of a Buyer Agent where you are a Client of this agent. This evens the playing field and gives you a professional advocate in the transaction.
Ask to see what we call a "Form 3" which is a state and Real Estate Commission required form describing the various relationships available to you in our industry.
Simply said, you are free to use whomever you please to represent you.