The following exchange of text messages is the entire record between Buyer and Seller.
Seller:  Hey, we’re overstocked on Standard Size Gizmo’s and my manager said to offer you 100 cases for a total price of $1,000 delivered to your warehouse
 
Buyer: DEAL!
Has a legally binding contract been formed?  Discuss why or why not and what factors might apply.  (limit 200 words, better answers likely will be shorter)