I have bought a few items off Craigslist and also sold some.
If I was uncomfortable about the person, you know that strange feeling you get! Then I would meet in a public place away from my home. Such as a Dunkin Donuts, Panera, etc.
In your case, some place where they had a plug and table to test it. Perhaps even a library if that is allowed! If you have a small LQS that you visit regularly you might even ask them.
I would NEVER meet anyone when I was alone!