Section 2--204. Formation in General

(1)  A contract for sale of goods may be made in any manner sufficient
  to show agreement, including conduct by both  parties  which  recognizes
  the existence of such a contract.
    (2)  An  agreement sufficient to constitute a contract for sale may be
  found even though the moment of its making is undetermined.
    (3) Even though one or more terms are left open a  contract  for  sale
  does  not fail for indefiniteness if the parties have intended to make a
  contract  and  there  is  a  reasonably  certain  basis  for  giving  an
  appropriate remedy.