Due in 4 hours_600 words

Dave owns a house.  He advertises that it is for sale for $250,000.  Lance offers to buy the house from Dave for $235,000 on Monday.  On Tuesday, Dave sends Lance a written document that discusses additional terms.  There is not price on the document.  Lance receives the document on Wednesday, signs it and gives it to his assistant, Tim, with instructions to mail it right away.  Later that day, Dave tells Lance via phone conversation that the deal is off.  Tim mails the document to Dave on Thursday.  Dave refuses to sell to Lance.  Lance sues Dave for breach of contract.  Dave contends there was no contract.  What arguments support Lance’s position?  What arguments support Dave’s Position?  Predict how the court will rule and explain your position.