A lot of times (in my experience) when you email those ads, because they're email contact only, you get back, "This one sold, but I can tell you where I got it.  They have loads of cheap blah blah blah!"   It can't hurt to email.  Arrange to meet them in a safe place.  I've bought a $200 PS4 with a controller and 4 games (Diablo III is amazing!), so it is possible.