Because you are a newbie, asking to trade OUTSIDE the forum, which is a typical scammer move. The next step in this 'typical' behavior is to ask for payment first.
Exactly, answer this now;
Will you use escrow or not?
I'm looking for a pretty simple answer like yes or no. Don't give me some long story about how your bitcoin wallet is on another machine or about how you're in Nigeria and you require us to send first because your account needs a "small" deposit. Just yes or no
Also dont tell us that you are the sole heir to an African king who died in a plane crash and that you have $2098709876 at your disposal and are willing to just give it away to a random person you found online.