How much of a good deal are we talking? Too good to be true? If so, that's a sign of a possible scam, so it warrants extra caution. escrow.com is legit, but the thing to be careful of if you do end up using it is NOT so use any links found in emails, but to manually type escrow.com into your browser when you log in to be sure you're using the legitimate site.

Since you are going to see the car (and the seller) in person, cash seems to be the safest bet. Cheaper for you in the long run, too.