The Phelps and Gorham Purchase was the purchase in 1788 of 6000000 acres of land in what is now western New York State from the Commonwealth of Massachusetts for $1,000,000 (£300,000), to be paid in three annual installments, and the pre-emptive right to the title on the land from the Six Nations of the Iroquois Confederacy for $5000 (£12,500).