Ask a lot of questions. If the seller is reluctant to answer questions, be concerned.
If the seller is unwilling to give information about the item they are selling (history, details, or better pictures) be concerned.
If the seller is unwilling to meet or give you an address to where you can meet or send a representative, be concerned.
Make sure the product is of value, good quality and functional.
Do not send money via e-transfer or through a money exchange service unless you can satisfactorily independently validate offer or for peace of mind, use our free Seller Buyer Validation service. (link to Brokerage page)
Make the exchange in person with cash if you can meet in a public place where you feel safe.