Once you get to the point of being a seasoned seller, (I know I have over 300 transactions myself), you can pretty much spot the tire-kickers, as they stick out like a sore thumb. The guy doesn't like people wasting his time, as most of his gear is higher end to boot. Not saying those that didn't get replies were tire-kickers, but I'm sure many are. These days, 1 out of 10 might be a serious buyer. Nothing like multiple emails, then no offer, only to disappear like Houdini. I personally can't stand that shit.