Hi Manuel, there is no law against a buyer contacting an owner/seller directly. That seller may refer you back to their agent, however, which will probably start you off on the wrong foot with that agent since you tried to go around him/her. There are a lot of wholesalers who contact listing agents and run through the same questions and have the same sales pitch.
I would suggest making friends with a few local agents who can help provide insights about areas and listings. Maybe find a local inspector who will perform a modified inspection at a discount in exchange for repeat business.
Be respectful of the agent's time. Do your research. If you make offers, make them with reasonable terms while still protecting yourself. Be the buyer/wholesaler who can close and deliver as promised. Don't be the one known for always asking for a price reduction or terminating last minute.
Let me know when you are up and running there.