Excellent res, I am not posting to further antagonize you because, like you noted, most people here are faceless people in cyberspace. My observations are these.. Though faceless anyone typing is still a person and should be treated with respect. I didn't really find your postings offensive, but the little avatar with the guy puking denotes an attitude of annoyance and intolerance.
I think your gear is priced right but at the same time remember you are here trying to sell something. You have ten posts and a few of them are in reference to your sale. Noone knows you or your professional nature. One attempting to have someone trade hard earned cash for a product should remember it is their responsibility to inspire confidence and make a potential buyer comfortable. Taking the time to write a few paragraphs to chastise someone's perceived self indulgence comes across as the pot calling the kettle black.
I do wish you the best with your sale.