And try to meet the local seller so that we know who he really is and where he lives. And this can also prevent fraud because we don't know what will happen later.
No local vendor would tell you where they live, surely nobody is going to do that for reasons that are so obvious, and you don't even need that information, if you are going to trade with a local vendor then you can do it face to face if possible, and you both will meet in an open place to carry out the trade. Follow safety measures when doing that.The important thing is we can trust the local sellers we find and if there is any suspicion, we can look for other local sellers. Usually, these local sellers can be found on social media to offer their services to friends or other people.
It is not safe to trust people who advertise that they sell and buy BTC on social media platforms, too many of them are scammers. You should use a decentralized exchange such as bisq for p2p trade, and if you want to trade in-person, you can also use bisq to meet local traders around you willing to trade f2f. 
