It's hard to say, I live in Philly and I've gotten some birds from people that might have been a little sketchy but I spent some time talking to them first. Craigslist can be a huge source of scams, don't ever send money electronically or through Western Union or anything like that of course, but many times people will send you for a loop.
Have you spoken to this person on the phone at all? Can they email you pictures from a computer? Do they have any vet records? Can they tell you about the diet or more personal things about the bird, like things they like or things they might say?
Can they meet you anywhere, somewhere like a Walmart or Target parking lot that's well lit? If they don't have a vehicle to transport the cage, can you ask for the bird first and get the cage later, just to verify the bird exists first? Do you have anyone that can go with you?