Quoted from rmarket:What you guys forget or don't know is that if you take a game to show and put a not for sale tag on it, you will get continuous questions about how much is it or what would it take for you to part with it. If you put the "if you want it this bad that you will pay a lot of money" price on it, you don't get any questions about the price.
Actually, that's a really good point. I guess that explains it. I have people in general that contact me and ask if any of my other pins are for sale and, trying not to sound like an idiot, I usually wind up saying, "Yeah... for the right price..."