You decide you would like a new Microsoft Surface Pro 7 tablet computer. In order to do so, you are going to sell your old tablet on Offer Up for $500. A buyer contacts you to purchase and will send you a cashier's check for $500. Upon receiving, the cashier's check is for $650. You contact the buyer who says " just go ahead" and deposit the check right away, send the computer and then please via Western Union return the excess. Should you follow the buyer's instructions given you already have your new tablet and need to pay for it? Explain.