Exchange US dollars

all decent ideas but your going to get clipped on the exchange , best way to avoid all the headache is take your Credit card , most don't charge a fee for conversion , best exchange rate you will find will be at a border casino if it has to be cash but you can walk into the sellers bank and do the deal right into his bank account with your credit card if he's only wanting cash to avoid cheques or money orders which take time to clear , then the card company will bill you in US finds when you get home ,simple and you don't wind up under a corn field for your cash .