In today's real estate market, inventory is very low. Sellers, including builders have the advantage over buyers.
To get new construction, with that square footage, and decent schools, at that price, I would agree with you. Understand this, builders will toss out a price but once it is converted to a contract that price can go up. There is no guaranty that they will sell it to you at the hold price.
There are so many considerations in purchasing new construction. The builder is going to pass on closing cost to you and their contract will remove certain contingencies.
If you have already registered with the community sales office you may be locked into using their agents and have a dual agency. If you have not registered you may want to consider having your own agent represent you.