It's one thing to correct someone if they truly don't know what they have. Be it they asked too little, or shot way over the top. I know many here aren't out to snake people, but rather lend some education and help. Mo - the guy who said he has over 300 drums, etc etc sounds like the kind of guy that bullies people into lowering a price. Comes off with a " I know and you don't " vibe. Those are who I lovingly refer to as snakes in the grass.
Good case in point. Some time back there was a 1950's Rogers kit. Three drums, all together the price was around $900. The bass drum had numerous extra holes and had cracks that you could see through. The toms were just as bad. I wanted the drums as a project and offered $150 for all, and even went into the details of what work needed to be done. Wasn't rude, just being straight forward. Saw recently that the drums finally sold for about $40 a piece. In the end all they got was what I offered, but not from me ( no worries on my end )