P.S. On average, builders/developers plan for 70% of their homes to be sold to a home buyer who has representation through a buyer's agent/realtor. But they clearly hope that you come by yourself, not simply because they don't have to pay the buyer agent commission, which they will pocket, but because they know you are at a disadvantage.
Think of it this way, if you went to purchase a car from a dealership and you could take someone with you who's likely purchased hundreds of cars, knows the market and all the angles, and knows how to work the system to your advantage, and you could do this with essentially no direct cost to you, would you pass on the opportunity?
Again, good luck!
Actually, the transaction where you will need a buyer's agent the most, is the transaction where the person selling the home has the most information, and you have the least information. Oddly, this occurs most often in a new home purchase. Builders/developers hold all the cards, AND, often will submit terms to you that lock you into not only the home they are trying to sell you, but also tie you into their mortgage company, their title company, their insurance company, and anything else that can make money off of you.
A good buyer's agent is going to be able to cut through all the junk and negotiate your best deal. Especially one who has experience in the area you're interested in, and one that has experience in negotiating on new homes.
Don't for a minute think that a new home purchase is the opportunity to do this yourself, you will get s_____d in the process.