I could never keep the scam.I've been scam off three times in my life.I do not sell anything you can never recommend more money.Always seek help from trusted people.They get envoy between you and the person to sell.In this case you will definitely not have problems.
In this kind of technology that there's no specific techniques how to avoid for scams much better to make a plan at first and don't be greedy to choose a project so that by the end it's not a problem for us.