I like to mess with people that put stupid prices on there stuff.
Like "Hey, I am interested in your N64. It's 15 right. I seen you had 150 but I realized that it must be a typo b/c no one in there right mind would think you could get. 150 for what your selling."
I usually don't get a response. But once in a while I get someone cussing me out over the email I sent. And that is where I get the most enjoyment.