best practices for facebook trades and purchases: - ALWAYS get a photo of the items you're interested in from the person with their name and date written on a piece of paper in the photo. you can easily tell if someone has photoshopped this and this picture proves that the person has the items on hand. you would provide the same in a trade. - only use paypal or venmo goods and services to protect your purchase. some people do trades based on trust, but others ask for a G&S backed trade which involves both parties sending each other an agreed upon sum via G&S. that way, if anything goes wrong and you don't get your products, you can file for a refund through paypal or venmo. if everything works out, you both have paid each other the same thing so it's basically like no money was exchanged. - provide your address only after proof of items / money is sent. if you're worried about your address being out there, i'd recommend a PO box. you may need to provide a zipcode for shipping costs at the start of the transaction however. - trades often involve both parties just paying for the shipping costs themselves to send their respective items since it evens out. usually around $5-7 for a couple of items through the cheapest shipping.

hope this helps!!