I was trusting when I was young and eventually learned when to keep my cards close to my vest (always). First, assume Armando may be your lost uncle with just what you need. That acknowledged ...
You want information, he wants money. It is actually easy to protect yourself and be gentlemanly in your conduct. Basically, when you meet a stranger, assume you might eventually become best of friends and treat them with complete respect. Ask questions but politely ignore his questions.
Give strangers next to no information whatsoever. If they insist walk away. And/or it is very easy to lie about addresses, phone number, and virtually any personal information and still learn enough about a potential dealings or offering. And as things pan out, gradually come clean or correct your personal information as the situation requires.
Also, why some have trouble with Craigslist transactions I'll never know as CL is perfect for both parties being completely satisfied in a barter exchange. And never come to know anyone's name, phone or ??.
Also, as others have mentioned, there is no rush. If you miss getting a rare something at a cheap price, it just wasn't meant to be. That attitude will go far. As will treating people kindly and with trust. Now then, what's your SS nr? Have I got a deal for you.