Never commit to payment without having seen an item. This usually won't happen for smaller items, but scam artists love to "sell" cars without the buyer looking at them. What usually happens, is the seller requires a deposit, and then never delivers the car. If a seller acts suspiciously, don't do business with them, and please report their behavior to us.
It is best to deal locally. Users that are able to personally meet the individual they desire to buy or sell to avoid a large number of the scams out there on the net. It is important to remember that Postify, LLC does not process transactions, and is not responsible for damages incurred by scams.
Sellers that want you to wire funds via services such as Western Union, Moneygram, or other services usually are up to no good. Avoid them.
Be careful when accepting payment. Fake cashier checks and money orders are easy to create. If someone who buys a big ticket item from you wants to pay via cashier check, money order, or even regular check be sure to verify that the funds are available before exchanging your item for payment. Failing to do so can result in a bounced check; making you responsible for losses the bank incurs.
Never, ever, under any circumstances, give out financial information. Credit card numbers, bank account numbers - any data that can be abused if it ends up in the wrong hands - should never be necessary to complete a transaction with a buyer or seller.
When you arrange to meet a buyer or a seller, do what you feel is safe and comfortable. Never agree to meet in an isolated area. Take a friend along if you like, or meet in a well-trafficked area where you feel safe. There are bad people out there on the web, and we want you to stay safe and unharmed.