I never let anyone into my home. I have let people come to my Porch though. My Dogs are a deterrent. Nobody wants to come into a house with 3 Pit Bulls that sound like the Tasmanian devil hahha.
I went to meet someone about a month ago and it was a set up. They called me back 3 times changing the location and at that point I new the game. Be careful of excuses about their transportation problems. You have to have a No Nonsense attitude.. not your problem. Also don't be alone. I sell Gold as a Hobby and I always make sure my Wife or Kids are ready to dial 911 if a struggle arises outside while they stay Locked inside. Its a crazy world, your NOT paranoid. Look at what happened to Ben Renick owner of Renick Reptiles.