I'd be happy to help. After doing a search for land near the bay in Amagansett, I'm seeing prices ranging from $500,000 p acre for bay view to over $2,000,000 on the bay. Like anything else, prices relate to location, location, location.....Also, as permits can take time in the Hamptons, price will vary along with the permit process.
I always say, it's not whether you find a great deal, it's whether or not the location is suited to your lifestyle. There's always going to be a deal available. It's about you and what property works for your needs. Feel free to call me directly 631-871-7844 Terry T