Paul sent a letter to his cousin Vinney who lived on a farm offering to sell him his ride on Lawnmower for $500 (it was valued at $2000). Vinney received the letter and immediately wrote a letter accepting the offer and put the letter in the mailbox when he went to town on Monday the 1st of August. On Wednesday the 3rd of August Paul was talking to his friend Colin and mentioned that he was trying to sell his ride on lawnmower as he no longer needed it. Colin offered to buy it for $700 and Paul accepted. Colin gave Paul the $700 and Paul said he would arrange for delivery the next day. 

That afternoon Paul received the letter from his cousin Vinney which said he was happy to buy the mower for $500. Advise Vinney, 

⦁ Does he have a legally enforceable contract?

⦁ What are the principles of law that are relevant in this case? 

⦁ Are there any cases that assist your arguments?