Here's what to run from: If your "buyer" does any of the following: needs you to front them money, involves a 3rd party who needs your help & is usually referred to as a family member or the transporter, wants to send you a check for the purchase that includes additional money you need to withdraw as cash to pay someone who is going to pick up/transport the item you are selling, asks you to do something with a "code" that will allow them to pay you or ANYTHING else they need you to do to help them buy your item. Whoever buys your item needs to come to YOU to purchase, preferably cash, no checks, no venmo or zelle. Tell them you will meet them at your bank to close the deal with a representative of your bank involved in the process, even if they are offering you a cashier's check. Asking buyers to meet in the Sheriff's parking lot to close the deal may keep a crook from showing up, but meeting at your bank sitting with a representative of your bank is better. Your banker is interested in protecting you, not helping your buyer, they know how to check for financial scams.