It's sad that too many times grown men act like little kids. If you don't like someones price just keep going, eventually it will drop out of sight. If a newb posts a high price, just pm them that it is a little higher than what most are selling for. The positive comments can help the member with a sale along with passing information onto others who have no experience with the item.
So you think that calling someone out in their thread who is coming into this site just to try and rip off members is acting like a kid? You also think that it is appropriate to PM someone you do not know to complain about their high price and that is somehow okay.
Hypocrite much?