helpppppppppppppppp asap

so im selling some stuff on craigslist and this person is like

ill buy your stuff plus 100 dolalrs to show how much i want your items
but on the check will be 3500 if you can take your money and send the rest to my shipping company i will buy your stuff heres the quote WHAT SHOULD I DO



Well i 'll really love to pay you through this method you've mentioned but i've already deposited all my money into the bank which i can only pay you through check and i'm also very much intersted in buying this item which i'm also willing to offer you $100 addition to your money for you to know how serious and urgently i'm in need of the item but like i said earlier that there'll be excess fund of $3500 on the check that will be sent to you which the balance on the check will be sent to my shipping agent through the Western union after the check has been cash and this will be used in shipping the item from you once the check has been cash ,so kindly reply me back with your full name and address for me to know if youre still intersted in selling the item so i can commence with the transaction inoder for the check to be delivered to you by tomorow or thursday afternoon thanks and reply me back asap