I am new to this forum, but I have participated for many years on several gun- and knife-related forums. My experience with forum etiquette is that you don't flame a guy's sale post, just because you don't like the price or the description of the item being sold.
If you don't like it, you don't have to buy it. Just ignore the sale post and move on rather than hijack the seller's thread with your unsolicited and unwanted opinions.
Give the guy a break.
I have been perusing this forum regularly, and have just about lost my interest in it because of the "I am [superior] than thou" attitude displayed by some of the members. and the childish flaming.